Square Roots method

[Dillon594209]

On the square root of 729 problem: How is 7 closer to 4, and not 9?

[N0vaNgamingworldz]

uuummm..... i dont get it :P

[metadera]

4:35 You didn't wanna do this one ? ? :D

[brjesusfreak]

I made one video editing error, but later on I addressed that problem

[metadera]

@brjesusfreak okay, but thx anyway, this is really a easy method.

[hiteshbairathi2]

And thanks to the inventor on this trick..

[hiteshbairathi2]

Thank you man you are awesome..

[runningwithmanny]

Xbox controller mic

[joel13966]

Can you show me how to find the square root of 113 & 119....

[Fabipunkinola]

doesnt work with 256?

[30mahima]

This really works... awesome..........



[GeminiGurlX3]

it doesnt work with 170

[brjesusfreak]

@GeminiGurlX3 13x13 is 169. 14x14 is 196. So the square root of 170 is not a perfect square.

[GeminiGurlX3]

@brjesusfreak so i would have to use a calculator to see if the number is a perfect suquare, just to use this method? do u hae a method for all numbers?

[grantveloso45]

my teacher gave me 5 points for using this methods real thanks:)

[rocktanker]

thanks ur the best i wish u became rich

[rocktanker]

thanks



[haaahaaai]

i pray for you to To get Beautiful, thin and soft girlfrind thaaaaaaaannnx maan

[brjesusfreak]

@haaahaaai now that's what i'm talking about! lol

[ThePunisherFTW]

I owe you sir. You dont know how much helpful it is. Thanks a lot

[jahangeerchana]

thnks a lot plzzzzzzzzz keep it Up

[dragonrag180]

Wow! I always thought it was impossible to calculate them! my professor always tells me to use my fingers and figure out a way to get to the number by multiplying squares and memorizing them.

[TheYousafzaikhan]

awesome brother !! u rock man .. never seen such a easy method .. im ur fan sir

[MrMangoDude]

THANK U SIR LOLOLOLOL <3

[kedens01]

This is great! Thank-you. A lot of people have comments about numbers that aren't perfect squares. I think this is still a good method for those. Take for example 648 and 668, the square root of both is still 25 and something so when you check your answer you have a lot closer starting point to the actual answer of the non perfect square.

[maricelgpimentel]

sir, i have a question in choosing the right answer for the problem 729 and 1024. in problem 729 you choose the second choice of answer which is 27 rather than 23 becouse 7 is greater than 6, but in problem 1024 you did not choose 38 even 10 is greater than 9. pls tell why did you choose answer in different way i'm very confuse. thank you sir and waiting for your repply

[Kandy471]

@maricelgpimentel In problem 1024, use 3x4 and that is 12. So 10 is less than 12 so the answer is 32. Take 3 times the next number (4) and you get 12. You was using 3 x 3 and getting 9.

[maricelgpimentel]

@Kandy471 ah ok now i know...thank you verry much sir!

[OUsooners209]

Nice!! This saved me battery life on my calculator... THX

[mysoukouss]

Thank you so much. You made it so easy

[mysoukouss]

How do you tell a number is a perfect square?

[sallypumpkin]

OH my gosh, this is wonderful! Thank you! Do you have any simple tricks for solving cube roots?

[pinkybananas1]

In the square root of 729 shouldn't it be the smallest option which is 23 and not 27?

[FM10LM10CR9]

@pinkybananas1 No because 2 times it's next number which is 3 times 2 (so 2*3) equals 6 and 6 is lower than 7. so since 6 is lower than 7 it is 27

However i understand your point. the only time you choose the lower number (so in this case 23) is when the first number (which is 2) times the next number (which is 3) equals 6 and 6 is greater than the number (which is 7 but might be different in another operation) will the number be 23.

[Kandy471]

@pinkybananas1 The answer is 27 because 2x3=6 and 7 is greater than 6. I think you are using the 6 instead of the 7. Remember to use the number that is in the problem. Hope you understand what I'm trying to say.

[DeadSkull101]

Much easier than my teachers method!! :O Are u spome kinda mathamagician? :O

[kelcindymoore]

Thank you! I understand this is only for perfect squares!

[florencehelen]

THANKS!!! I feel so smart now!!!

[aramon5]

wat happen to the 624 ?

[sanchez6395]

I don't get why you cross out a number... Please explain

[eiuhna]

how about in 2 digits?!..

[eiuhna]

@goshiluvarchie thanks...



[sonofsueraf]

hey, i cant hear you, so i can't understand what you're saying...

[16yearoldwhiteboy]

Jesus rocks and so does your skills! Thanks (:

[barcakid101]

i like this

[whitbyjet65]

What's the square root of a sheep's foot?

[XezaaHD]

@whitbyjet65 9001

[si12j12]

This has been a very good way for me to to find the square root of perfect squares , Thank you very much.

[66CrtS]

@pavonmark the square root of 199 is actualy 14.106735979665884425232163690­877... because 199 isn't a perfect square

the square root of 196 = 14 tho.. and it works =D

[simux250xxl]

ok sqARE ROOT of 256=16 but this bethod say that sqare root (i say sr)= 18 or 12

[ChrisCaelanThomas]

I look up negative squares and I find videos like this. That angers me. If you can make a video on that please do so.

[labadoorala]

this is so cool ! I finally understand it ! ahaha

[twintowerxx]

Anyway I can't get how can you get the numbers of k1 and k2 etc.

But this is unchallengeable thing.

This is not traditional solution.

The perfect thing is still:

r2:1=?

20r1=?

20r1 + r2=?

20(10r1 + r2) =?

20(10r1 + r2) + r3=?

and you know what is els.

[SuperJamieangel]

this only works for perffect squares not for like the number 656 whts tht answer

[genovianprincessify]

This is perfect! I should really tell my classmates to look at this video! It's great, great, great! Thank you!!! This is my weakness in Math and you totally helped me out!

[packsofsnacks634]

Okay so that's true than solve 648 and 668 and tell me the answers they "should" be different but they're not because your method leaves out the middle.

[brjesusfreak]

Again, like I said before, this method works only with perfect squares. 648 and 668 are NOT perfect squares.

[mooshpad]

@brjesusfreak but what about 21904? how would you solve that?

[1kaz2y5]

this is a really good way of solving perfect squares. thanks for going to the effort of filming this whole thing.

[zk453]

solve the square route of 865

[mixolidianmode]

i like this method.... why teachers dont show us these tricks??

[Devin77skate]

does this only work on 3 digit numbers ?

[1kaz2y5]

@Devin77skate 2:49

[djbat3]

Thanks for sharing this!

[xKingPola3ux]

They have to be perfect squares first of all, and 199 is not. And the square of 14 is 196 not 199

[vfootball1996]

what is the square root of 494

[brjesusfreak]

22.2261

[DevoutSkeptic]

@brjesusfreak Good work. Now what's the super square root of 494 lol?

[brjesusfreak]

I was clear in pointing out this method works for perfect squares only. 199 is not a perfect square. The sqrt of 199 is 14.1067359. It is not just 14.

[medicham6]

@brjesusfreak right

[lochidoconjc]

@brjesusfreak how do you know if a square root is perfet if you havent solved it yet?

[BrandiMB1]

@brjesusfreak

This is a great solution to square roots. :)

[mooshpad]

@brjesusfreak what about 21904?



[mooshpad]

@brjesusfreak how would you solve for 21904?

[XezaaHD]

@mooshpad you take out the 0 you'll get 219 4 the sqrt of 4 is 2, closest sqrt of 219 is 14 (it's 196) so your answer will be like 14 2 or 14 8(the 8 came from 10-2). then you're going to multiply 14 times 15 which is 210 and then compare 210 to 219, obviously 219 > 210 so your answer is the second, 148.

[shyleanne25]

@brjesusfreak

Using the method you shown. The square root of 199 is 13. Without checking with the calculator it seems to be a perfect square, but it's not. So, how can you tell if a number is a perfect square or not? I'm still confused.

[Synchronizationate]

Oh i get it now!!!

[markomanyalak]

square root 149,,,,

[brjesusfreak]

149 Is NOT a perfect square.

[gatomommy]

Awesome!!!!

[summerdying111]

I did this and my professor did not accepted it. Can you believe that.

[brjesusfreak]

Did you tell him/her that this works for perfect squares only?

[Goombanegro]

send your professor special thanks for me my friend...

[mikeytitanic]

Wow... thank you for sharing that. I had no clue of this method. Makes it much easier to understand.

[mysteriouswolf27]

thanks!!! dude you help me a lot

[firaz91]

Wow!! Thanks. It really works. This is much easier than the method my teacher taught me.

[firaz91]

Hey what about four digit numbers or five digit numbers? Can this method be used to find the root of 16129?

[Scatmanfan45]

yes, keep watching at 2:55 and you'll see

[redslasher1]

Thanks so much!!!!

[mtrcurse]

special thanks to prof. barbossa also to you

[pjuicy79]

THANK U THANK U THANK U!!!!!! No teacher has ever made this so simple!!! LUV UUUUUUUU!!! LOL!!!!!!

[brjesusfreak]

@pjuicy79 Thank you for your appreciation.

[Adell101]

FINALLY

SOMEONE THAT EXPLAINS THE STUFF

jeez this is way better then the other stuff that i was watching

thank you dude

[TheLittleWhiteCar]

this is the greatest thing that's ever happened to me. i love it. thank you!

[pkuneeb]

tHnx ........BUddY bUt i Still confussed on last step

[oxauna]

can you do the square root of 256 like this?

[brjesusfreak]

Yes, because 256 is a perfect square. 16 squared or 16x16= 256.

[oxauna]

thank you

[thechangee]

What about 5 or more digits numbers?

[Nerd4evar]

wow thank the dude with the method for me !!!

[kreator34]

why did u skip 625

[brjesusfreak]

I made an error when editing the video. It was not on purpose.

[ReprogramurMind]

Does that method work with all equations?

761 I get 29, is this correct?

[brjesusfreak]

Like I said, this method works only with perfect squares. 761 is not a perfect square. This method works with perfect squares.

[rubybutterfly007]

thank you *smoochez

[NOAHNXT28]

How would you use this to fiqure out a number like 16? i tried fiquring it out:

16

cross out 1

X6

6 is not a perfect square and closest is 4, the sqyare root of 4 is 2

X6 2

10 - 2 = 8

X6 2 8

Now what? do i dive the 8/2 because that would be correct...

[levi799]

16 = 016

cross the 1

0X6

6 is not a perfect square so you go to the 0 and then you get 0

Take the 6 down and then 10 - 6 equals 4

0X6

0 4 = 4

so the answer is 4.

For another example on how this part works look the response somewhere below me where jerelbuggs explains how to get the square root of 225.

[pazteur2007]

dont you think that 8/2 is actually 4? XD

[EmilyOblong]

what if the first number and the sum of the square root of right extremity and its successor are equal?

[kelison24574]

how would you calculate 225?? PLZ RESPOND

[jerelbuggs]

225- cross out the 2 in th mid

2_5- 5 has no even square, so you go to 2

2_5- 2 has no even square, so the next even square will be 1.

bring down the 5 for the first num and subtract 5 from 10 (which stills equal 5)

so 15 is your answer ...just follow the steps he explained.

[DeadStar0055]

ow thanks alot it really helped ^^'

[jamespotter015]

great method..do you know how to calculate a non perfect square? and how do you calculate if there is only two digit?

[03212827320]

beautiful way to calculate the square root bye Syed Abdul Khaliq

[lookinlovelyashell]

i wish you were my teacher

[vincenzo15yrs]

Happy Square Root Day 3.3.09

[JD5thnz]

how can u simplify the square root of 288? pls. reply ASAP

[brjesusfreak]

It is not a perfect square.

[purev1olence]

How would you do this with something like 4,624 (68^2)?

[kiaragrace17]

This is really an easy way of solving square roots. I'll share this with my kids who really have problems with math! Thanks!

[originalfizixx]

GREAT job. This is one of the best vids on this kind of thing. Clear, explained well, you did a lot of examples and the method is straight forward too. This is what makes online vids useful and fun....thanks!

[Xxcocoapuffs13xX]

THANKS SO MUCH!!!

[LarrySergioZaratin]

For the square root of 961 you could do the square root of 169 (961 flipped) which is 13 and flip that to get 31... which is what you got.

[shriekingshacksmeade]

thanks!! you helped me a lot!!

[TURQUESAMBER]

thanks,

so what would you do with a number like 95,648?could you do something like that?

[luvrhino37]

You can tell 95648 is not a perfect square because it ends in an 8, 2, 3, or 7.

For a number like 95481, i'd know that because it ends in an 81, the last two digits of the square root is 09, 41, 59, or 91. Since 300^2 = 90000, 309^2 seems like a good guess.

All of this can be shown using the binomial expansion of (50x + y)^2 = (50x)^2 + 100xy + y^2. Note that the first two terms end in 00 -> last two digits come from y^2.

(300+9)^2 = 300^2 + 2*300*9 + 9^2 =

90000 + 5400 + 81 =

95481

[luvrhino37]

Oops, i answered this above. I thought i had replied to your post. If i needed the square root of 95648, specifically, i'd use my result from 309^2. Note that (310^2 - 309^2) = 310 + 309 = 619

95648 - 95481 = 167

167/619 ~= .27

Thus, my answer would be 309.27.

If i needed more accuracy, 309.27 is a convenient enough number that i can still square it in my head (due to the 0 in the thousands place) so i'd square it and apply the division again and get within a ten-thousandth or two.

[thanh20]

Thanks

[thanh20]

your video is good but does this method work with all problems because I did the square root of 126 and got 14 but the calculator comes up with 11.22497216

[brjesusfreak]

It works when solving Perfect Squares.

[heidithebomb]

Thank you SOOO much for sharing! This is a nice breakthrough:) I get stuck, spending too much time thinking, this is going to help me for life! I'm going to share it too! I love math tricks that work:)THANK YOU for the post!

[tomandjerry600t]

how did you get the 28??at item number 1

[brjesusfreak]

The square root of 484 is 22. And that is what I got. I did not get 28.

[Xev17j]

cool man

[ladyred7777777]

cool i learned it better now.

[ProfessorGusti]

Hi!

Prof. Marcio Barbosa also developped a method to find cubic roots. Do you know it? I searched a lot for it here in Youtube, but couldn't find it :(

[bewbala]

this is a very clever way of doing large square roots faster! im going to show my teacher this =)

i have a test tomorrow for quadratic formula where we cannot use calculators, only bad thing is he is giving us numbers like 50 and 107 that we have to square which can't be squared :|

but nice video!

[Mythicx88]

Yeahhhhhh go jesus yeahhhhhh

[JansenViana]

This makes square routes so much easier!!!!

[ravalex90]

NCIE VIDEO MAN IT'S ALEX FROM SRHS WHOA NCIE VID MAN GG :p

[brjesusfreak]

I made a few editing errors but I hope this helps you. Thank you.