Simplifying radicals

[TheAwesomekman]

Yo where da fuck Jaspa at?

[ADancingOstrich]

Thank you so much it makes soooooooooooooooooo much sense now :D

[cartoonfanish]

Very nice video but little confusing

[fackhead]

this isnt ofwgkta

[elidontlie]

if Sal ever comes to my village he can use my sister she is #1 prostitute lol

[BloodyViolet314]

Thank you man, I got midterms coming up :)

[1989Firecracker]

Niggers can't do math!

[TutorialTelevision]

you sound like vin diesel i little bit :)

[bigtopbollocks]

How do you fix a rooted school system?

Answer Get Kahn in to simplify those radicals!

Kahn you are a legend! and thank you so very much!

[Brandisofthesand]

THIS GUY IS AMAZING. So easy to understand! :D You saved my life dude...

[Christknight72]

You are a wonderful teacher, and this was quite helpful to me. Thank you

[TheKarlProductions]

I love how your videos load up so fast!

[shakilmujeeb]

@poglet100

You can also do it like this. Just convert the numbers into factors e.g. √27 = √3*3*3 and take out like pairs. √(3*3)*3 = 3 √3

[AlbinoDubstep]

=D so helpful if you dont remember something from a previous class..

[RollTider4]

Your a boss

[RSMFORCE4]

THANK YOUUUUUUU!!!!!!!!!!

I was so nervous for my test

[Cr1pp3r1]

Test sucks need to learn orgt kicke out of honors

[got2lovemycomment]

Thank you! this really helped on my homework :)

[dangerous9111]

wow that was confusing but i think i get now...maybe

[poglet100]

I am VERY confused... :(

[Nayelhi36]

Thank you sooooo much!! your an awesome teacher!!

[johnericsantiago28]

my brain is bleeding but thanks a lot...it helps me

[johnericsantiago28]

is that always 1/2 power?

[MockingByrd97]

Im homeschooled and found this more helpful than the videos they have me watch

[PokemonGlaucousDev]

You don't understand how much I love you for this.

[MrCoolUS]

Man you are an amazing teacher, no joke. You made it seem really simple.

[SHINeeROCKZZ]

Guys don't blame the freaking teacher. The teacher has to teach like 20-40 freaking kids, while online its directed to you. Quit being so disrespectful

[zjdak11]

you said something about the highest factor that is a perfect square. 320=16*20

i was wondering for 320=64*5 then 7(s.r.)64*5 = 7*8(s.r.)5 then 56(s.r.)5

?

[DrKaner]

i been trying to figure this out for 2 years i love you

[fdgod38]

Wow, are you fucking shitting me, this is in "pre-algebra"play list , this is embarrassing, i learned this shit in 9nth grade and 11th grade, algebra 1 and algebra 2. Now I'm just reviewing this, this just proves how shitty how most U.S high schools are.

Wow... i agree with you, i wish i were too.

[JJBeev]

Thank you, this was very helpful!!!!!

[TheClaiclai17Channel]

You're the Best! :)

[Debedeb]

need to factor it out in a tree

[ofomatheblackbelt]

6:24 how did you get 27 sqr 2

[iWriteUinMyDeathNote]

@ofomatheblackbelt 9 sqr 18. You ignore the 9 for now, find what 2 numbers with clean square roots (if possible) you can multiply to get 18, like 2 times 9. 2 x 9 = 18 so this will work. Now you find the square roots of 2 and 9. the square root of 9 is 3, but you can't find the square root of 2, so just leave it for now. now, remember the 9 you ignored? multiply it by all the numbers you got. (the 3 and sqrt 2) 9 x 3 is 27, since you can't find 2, just leave it as sqrt. Now you got 27 sqr 2.

[homousios]

thank you for a truly radical experience.

[professionalcynic3]

KILL PEOPLE BURN SHIT FUCK SCHOOL

[carrottop769]

i love your voice and the way you explain things your better than every math teacher ive ever had...lots of love -Mike

[gsduhra]

thanks a lot cause I have a huge test and this really helps

[d4k074p4l]

you explained it better in 6 minutes than my math teacher did in 40 mins...

[xJasonsDaMan2]

@d4k074p4l I love how you people in the internet talk shit about your teachers, teachers are teaching about 20-30 kids a class, so shes teaching it to everyone. Online videos on the other hand are like private sessions thats directed to you, thats why you understand it better.

[GTboy96]

Thank you so much! I wish I knew about your videos before I started to have trouble with this topic. This is perfect review from my upcomming algebra regents

[DeathNoteLT]

creepyyyy i was wondering what a radical was. 0.0........5 hours of studying math and no sleep and you'll end up like me. a annoyed drunk acting person with a melted pudding brain.

[TheDenisMonster]

How come sometimes you multiply the number in the square root times the number outside but sometimes you don't? I have an algebra 1 test tomorrow and if I don't pass it I have to retake the class!

[182desertrose]

fairly clear. good basic knowledge

[ZykaaFA]

This guy makes math fun! I already had a great understanding of radicals and even radical's that involve fractions,(and im only in 8th grade) but anyway this helped a lot because I would always get these wrong on my tests so thank you very much :D

[armthehomeless06]

Khan Academy has essentially replaced my Math class. I can talk/do other homework in Algebra II and get A's on all the tests. Man, Mr. Khan needs some type of higher recognition. I don't think people realize how much this guy is contributing. THANK YOU KHAN ACADEMY

[soccermm1]

subscribing !!!!!!

[flocilev]

I learn less at school,than I learn on youtube(sorry for my english)

[moonksiepoof]

very extremely helpful! better than my teacher

[saxondance]

THANK YOU SO MUCH! I was literally failing algebra and you saved me. I wish there was some way to show my appreciation for that. I have cried my eyes out so many times because of not understanding algebra AT ALL.

This is such a great thing that you are doing for us and you deserve so much in return.Thank you!

[ALEXmyusername]

Very helpful!!!! I subscribed, hopefully he gets some money from YouTube!!

[patomargain]

i LOVE u

no homo

[kermitcintronsucks]

one thing that would help students I think is if you extrapolated these concepts into a real life situation where they would be needed. Like in finance and geez many other word problem examples.

[rokr4Christ]

"radical" man .. :D

[Renato32997]

Wow. The school system in the US is really fucked up. If I can learn this in 10 minutes on YouTube, while my teacher makes it sound very confusing, they're something wrong here!

[shredftw]

@Renato32997

Yeah I have taught myself about a months worth of class in about 2 hours today thanks to Khan Academy.

school system is fucking ridiculous, yes.

[WeEatBrainz]

@Renato32997 Yeah...seriously... i wish i were home schooled lol

[aJerseyThing]

@Renato32997 cause the older generation sucks, wait for our generation to get up there

[thejonathan130]

@Renato32997 look I agree with you completely but younger kids come to learn from this guy and all people like you seem to want to do is swear on this site... if you need to swear about this subject do it where you know kids will not see it. again I agree with you and I'm angry to but still.

[LtSteves]

@Renato32997 well your teacher has to go at the pace of the dumbest kid in your class

[dboyuc]

@LtSteves so true. These vids are great but let's not jump to any quick fix conclusions.

[Un1234l]

@Renato32997 Yeah it's crazy. The concepts themselves aren't difficult yet so many people (myself included) failed at grasping them in school. Of course there are those who understood it by the first lesson, but why is it that Khan teaches it so much more effectively in my opinion?

[boblee666]

@Renato32997 maybe it is because he got his degrees from MIT and Harvard.

[pcgamingman]

saved my ass bro!

[KBClublife]

Thank you for another great video, you are great!

[TuxedoPenguin89]

awesome man



[Brooklyn551972]

Okay, thank you so much! Our math class has the worst teacher and she's spent like 2 weeks trying to explain it, and we still don't get it, but I finally understand it!

[mileyfan465958]

Thank YOU so Much!!

[OutlawAirsoftPA]

Thank you so much, i was failing math because i had no idea what to do, I think you just dug me out of a hole.

[phr4nk3rd00d13]

I'm soooo confused right now. I'm normally 100% okay with simplifying radicals like sqrt640, but this time, I used this method, and I got 6sqrt10 when it's actually supposed to be 8sqrt10. . . I'm confused O_O This doesn't normally happen to me!!

[phr4nk3rd00d13]

@phr4nk3rd00d13 Whoa. . okay never mind ^__^

[TalkDaTech]

i look up math vids for help on my homework, but i am just wondering, do people just watch these for fun?

[Smoshfan1015]

u are a genius....:) thank u soooo much for helping me understand

[samayangel105]

YOU ARE AMAZING

THANK YOU

[soccershar17]

thanks sal you sound like Muzza Fuzza if you know who that is hes on Youtube

[gleno61927]

What is the Square Root of 72

8.4852813742385702928101323452­582

[halomizer]

Sal, you're my math teacher. I just kind of show up for marks.

[madhawarock]

You just made my life Easier by day by DAY THANK YOU !!!

[ItsBroj]

Where did the 56 come from ???

[keatyn005]

make a video with equations like (x^2)(x^7/3)

[thekoolaidman156]

help me with the third root of 5x^2y

[thekoolaidman156]

thanks

[gehtomacgyver]

√128x^5y^2

I need help with that ._.

[TheMysweetypie]

YOU ARE BETTER THAN MY TEACHERS. THEY MAKE MATH VERY CONFUSING. duhhhhh

[muhatashim]

Thanks but I already failed my final and thought about learning this lol.

[hazeleyedcutie127]

lol i have my math mid-term on this tomorrow and i finally get how to do thisss! thanks*

[bandnerdgag]

midterms here i come

thank you E>



[seenandnotheard]

wow you're so full of yourself. don't pretend to be on here to help people..just trying to show off what you know by doing things the "long way"

[jstarks123]

@seenandnotheard ..he's just trying to help people understand why the rule works...what's the point of knowing how to do something if you don't know why it works? And if he's "pretending" to help people, why does he have almost 2,000 tutorial videos on youtube? Give the guy credit...he's taking hours of his own time to help people.

[N1nj4Sk1llz420]

Oh by the way I don't like the way you set your root symbols, you should separate them with brackets implying the multiplication step ... especially when teaching it to beginners.

[Tw00n09]

Thanks this really helps me.!

[coburn87]

Thanks

[Msbbopalula]

Excellent! Thanks a bunch!

[MrCoolBeanss]

thaaank you!

[bunniboo1414]

OMG YOU JUST SAVED MY LIFE. I HAD NO IDEA HOW TO DO THIS BEFORE, NOw I GE IT. I have a huge test on it in two days, and you just got me an A.

[Franticfailure19]

How do u answer Square Root of 4g^4d^3

[LuotkaSnih]

thank you so much!

[mylifer0x]

Dude ur videos really help me understand! I wish i had a teacher like you for geometry!

[HDGTrailers]

What softwaare is this?

[Wildmagic18]

OMG Thank You so much!!!! I have been struggling with this so much. My dad told me about these videos and it helped a lot!! Thanks and keep up the good work.

It's real good what your doing here:)

[matheadaches]

I missed class yesterday due to transportation issue. My car's starter broke down, so I ended up ditching my favorite class, math. Lol.

[abrasive8]

You sound sexy

keep talking nerdy to me -^^-

[nightstalk102]

Do you have a presentation that simplifies radicals with variables like x squared, x cubed etc. ?

[chrisdeli7158]

i dont have enough of mental power to computate this

[3shaceline]

thanks:)

[vipulawick]

very simple ..thanks

[xariemhei]

now ..i know! very vivid solutions. .tnx!

[majaglitter]

in 7 square root of 320 can the simplified form be 7 square root of 5 times 64 rather than 7 square root of 16 times 20?

[mikedrinksdiet]

thank you SOOOOO much!... homework @11:30+confusion=Failing geometry.... confusion+youtube=no more

[X36011]

Thanks for the help Salman. My problem was a little different but it provided the nudge I need.

For anyone wondering what the problem was:

sqrt[54x(y)^4]

I just solved the number 54 and realized that x is like 3, it can't be rooted, and y can be rooted cuz the sqrt of 4 is 2.

final answer: [3(y)^2][sqrt6x]

[ColdHearted19]

I still dont kinda get it.

[joyorchard1992]

What about ^3 square root of 81?

[ash9023]

maybe someone can explain this to me, I used to be so good with algebra but it's been 2 years. The question with the 7 and square root of 320 I keep getting 14 and the square root of 5 not 28, my problem is Why after the square root of 16 when you get four why don't you take the square root of that and make it 2 which is where I keep getting 14. I am extremely confused :(

[ash9023]

@ash9023 I figured it out, I used the factoring tree method,

[dmolition123]

Dude I love you!!!!

[degrees40201]

It's like he was mocking us after when he ended the session with "have fun!" ...

[eloexplorer]

you r brilliant.

[techking00107]

YOu rock

[iareace]

when i get rich. it would be on a big part thanks to you. therefore if it really ever does happen, you will be receiving a monthly cut as part of a big THANK YOU you so greatly deserve. hat tips to you sir.

[LostheartDarkclan]

Urrgghhhh my head hurts this doesnt help at all

[BoscoWins]

Your an awesome teacher I'm a freshman in highschool and I just simplified a version of the golden ratio into the usual simplified form.

[tayrobinson123]

Thank you So much sir! God Bless you! This will really come in handy for my final!

[ruffusrules101]

how do you simplify when a decimal is inside the radical or square root symbol

i have 0,0009 in the square root symbol and idk how to solve it

[coconut11man]

he's asian

[HaydenDPresley]

Lol I can still remember--my algebra class hated this!

[NACHOBUSTER]

Another midnight homework session saved thanks to YouTube lol. Straightforward and simple, the way math should be.

[maxconrad17]

Thank you..math is so hard for me...

[MultiDanradcliffe]

u r amazing

[D28X]

amazing...

[benthemad]

Khan... I'm tutoring someone in radicals right now and the easiest way for me to explain perfect squares was to show her that if you completely factor a number, any factor that repeats will create a perfect square, and the product of all of the repeated factors is the largest perfect square in the number. A simple trick, but effective.

[beetle212121]

i have a test tommorow and i used u after seeing you on cnn student news thanks so much

[KMoney4680]

thank you so much for this!

I have a test on this tomorrow and i'm now starting to understand it. thanks!

[fox454x]

@KMoney4680 same

[Leatherback2]

@KMoney4680

sorry i voted down, I clicked by mistake. Too many square roots!

[N1nj4Sk1llz420]

@KMoney4680 You only now understand it the day before a test? Hahahahaha that's epic.

[KoolThing14]

@KMoney4680 You have a test tomorrow (Well, tomorrow a year ago) and you're just starting to get it? How did you do on the test?

[purplerox315]

i kind of still dont get why 72 would be (36*2)1/2

[SerpentSouI]

@purplerox315 a square root is the same as to the exponent of 1\2

its like subtracting and adding a negative, just another way of expressing the same thing.

[pageerror404]

Thanks for the help with this, 5 stars

[deanne105]

ur awesome!!!

[stinky194]

thanx alot my math teacher makes evrything confusing and this helped a lil!!!!!

[KoolThing14]

@stinky194 9/10 math teachers suck ass at this.

[12ainbow]

just saved me on my math homework, thanks!

[Dafneswim]

thanks

[TheStarkiller24]

in the problem in 6:32 will it still be correct if we wrote 9*2 instead of 2*9?

why did you put the 2 first by the way?

[Phyte]

Doesnt matter which way round.

[bria2771]

yes cuz youll find out when u r in trig i think

[purplerox315]

@TheStarkiller24 we put the 2 first because you cant simplify it anymore. 9 can be simplified to 3, so if you put 9*2 first, it would be wrong.

[thrashing0donut]

where are the modules so you can practice these?

[magna188]

Thank you sooo much! this really helped me!

[artistikdude]

Thanks so much man, my math teacher kinda sucks xD

[hope518]

im such a dumbass

[liisrandom]

Ty soo very much!!!

[jf1frosty]

thank you soooooo much!

[HowAboutSomeTruth1]

Lol I got 5 x 64 for the last one. Was worried till you said "now are we done?".

[Gtrplyr1]

Very helpful, however is there a video for this with included exponents and using other roots such as 4, 5 etc?

[mburch1974]

on the problem 7 times the sqrt of 320. How do you go from 28 sqrt of 4x5 to 56 times square root of 5? Where'd u get the 56?

[SKoGoMoney]

Because the sqrt of 4 is 2, he took it out of the radical and multiplied what was already outside of the radical by it. He didn't write the step but he kind of said it.

7√320 = 7√16*20 = 7√16 * √20

Because the sqrt of 16=4...

7*4=28

So,

28√20= 28√4*5

Because the sqrt of 4=2...

28*2=56

So,

56√5

[MegaShadowslayer]

AWESOME

=D =D =D =D :-) 0.o

[sk8tterpriincessss]

woa. i never would have understood that before now. it took me a couple problems to get what you were saying, but i get it now! thank you!!

[whatapyt]

tthankss so much

[MystyXsoul]

so Helpful !!!!!!!!!!!!!!!!!!!!!!!!!!!! XD

[sasytastic12345]

lol i just failed 2 tests on this and shes making me retake em next week and this relly helped me thanks

[odutola123]

true... its also -6. im the 8th grade and im learing that now!!!!!! well and in seventh but more know!

[Linoxism]

Good job, thanks. I'd have liked to see a bit more about that final technique you presented though.

[HelloStevenful]

The square root of 36 is not just 6, it's also -6.

[tdeladurantey]

lol...hope you didn't take a test with that in mind.

[iheartpuppy]

negative square root of 36 is -6 u have to have a minus in front of the radical, or the answer is just 6.

[irvinekid]

nope you are wrong, 6x6 = 36, -6 x -6 = 36

square root of 36 has 2 answers no minus needed

[iheartpuppy]

you do if theres a minus in front of the radical (sq. root sign)

[Ignaceous]

Negative numbers don't have square roots...period...

[aMericandjMT]

Yes they do. ever heard of imaginary numbers? They just don't exist in our dimensions :)

[iheartpuppy]

im not saying that....the minus is in FRONT of the radical...

[Ignaceous]

O.O What?

[iheartpuppy]

ugh....whatever just forget it....no one is understanding...

[DivineWisdom777]

your stupid rofl its the same thing the negative sign only means its minus 6 but the main number is 6 so the number never changes

[crishift97]

no it aint