Equations 3

[myproject876]

Your a genius at teaching

[zkhan54]

Education is coming to your bed room. this is F***King Great

[TheAuzzyboy]

thank you so much for your website ive had trouble understanding linear equations (the unit i am doing in class atm) and your website allows me to practise and look how to as well thank u again :)

[ChrisEyeris]

Damn comment boxes don't respect my returns..... now it doesn't make sense at all... hahahaha

[ChrisEyeris]

wow, i feel stupid because I do it the easy way... 2x +3 = 5x -2 2x - 5x +3 = -2 2x - 5x = -2 -3 -3x = -5 x = -5/-3 x =5/3 Isolate the x by transferring everything to one side With that keep in mind that when transferring: 'multiply' becomes 'divide' 'divide' becomes 'multiply' (by the denominator) 'plus' becomes 'minus' 'minus' becomes 'plus' ('suare' becomes 'root') ('root becomes 'square') But then again, that's how I learned it....

[majdThehotie]

hes good but i hate how he puts x+x +1+1+1= x+x+x+x+x+x -1 -1 and all that crap

[1989Firecracker]

Thank you, now little niggers can pass their math classes with D's.

[TheAtomicGoliath]

My teacher is horrable! You might have saved my grades!

[jonathanperez99]

thanks alot i passed my dyo test which says how i will do on my state test and i passed with only one problem wrong thanks alot this is my new studying system

[Plutog33]

What Program do you use?

[LOLWaatXD]

When you do 5/3 = x ... isnt that 5 divided by 3, to get x ? which is 1.7?

[vicksoma]

@LOLWaatXD yes that's right

[roejames12]

There's the trick: Teach how you want to be taught! Simple. :)

[ragethefail56]

i love this guy. no more failing!

[GreedX23]

So when the equation comes down to 3=3x-2. Why do you add 2? What is reasoning for that?

[DmoneyDizzy6]

@GreedX23 becuz u got -2 so if u add 2 then 2-2 is 0 so u can get rid of the numbers

[FoundNoBetterNick]

@GreedX23 To get rid of the negative number?

[Nadrealis]

Dear Mr. Khan,

I would like to know what program you are using for this. I love the approach you're taking when you write out equations. I've looked through most of your math videos and love the format.

Thanks.

[roejames12]

@Nadrealis "I use Camtasia Recorder ($200) + SmoothDraw3(Free) + a Wacom Bamboo Tablet ($80) on a PC. I used to use ScreenVideoRecorder($20) and Microsoft Paint (Free)."

[RAWRAnnuh]

When you do the problem: 2x + 3 = 5x - 2 , does it matter which x you subtract from? because I didn't do (-2x) on both sides, I did (-5x) on both sides and still got the same answer.

[Nadrealis]

@RAWRAnnuh Like he said in the video, as long as you do legitimate operations you will get the right answer! Good job! Keep it up!

[kariokiinoc]

Thank You, Thank you, Oh how I wish I had a teacher like this when I was in high school. In my day, you were not required to take any thing higher than basic math, I have never learned alegebra. I am now returning to school to earn a Bachelors Degree and this site is my new best friend !!!!!! Thank you again, I so appreciate all that you are doing.

[joydeepdhr]

i bet my school teacher by doing a algebric equation just in 6 second.

[NutsnGuns]

I didn't learn this much from my tutor, lol

[joshua10227]

i dont get it???



[CoCoaAnene]

@joshua10227 wow

[SKILLS836]

lol, this is my first algebra homework assingment

[zincoapril24]

:)))) nice teaching style



[GodlessMorality]

Awesome explanation! Thank you so much!!!!

[MrBlenderMan]

btw the way you explain it seems incredibly convoluted...good luck to anyone trying to learn from this vid.

[MrBlenderMan]

rofl this is WRONG!!! 2x DOES NOT EQUAL x * x in the same way 2(3) does not equal 3 * 3. x*x = x^2.

[CrimsonGator3]

@MrBlenderMan That's a plus sign, not a multiplication symbol in this video.

[winifredchen]

this is great ! i bet my teacher will be very jealous

[TwilightHostGirl2]

This vid seems to be way more complicated than it should be... What I learned was to get all the X variables on one side and all none variables on the other. In other words, subtract the 5X from the right to the left, creating a negative 3X, and subtrating 3 from the left anf moving it to the right. Then you have negative 3X equals negative 5. When you divide the neg. 3 from the X, you get the answer: 5/3.

It's real simple. Just remember to get all variables on one side.

[ChanceMyHeart]

TRUST ME on this I notice if you talk back when he ask you question on video you seem understand it better. Just picture him being your teacher an talking to you in real time. So simply answer his questions when he ask you. So when you say number out you know if your wrong or right. Trust me I havent done math in nearly 14 years an I am honestly starting get math again. This man in the video is a true legend. He is a true hero an good example of youtube member. I just may pass my GED now..LOL

[danogzilla]

anyone enjoying these on youtube would benefit greatly from going to kahnacademy . org. the site gives you a space for doing examples and keeps track of your achievements. its a great tool.

[theSUICIDEoption]

thank you

[onlyoneskiez]

awesome

[MarvelsofaLifetime]

This man right here is a mathematical genius – and in general a genius. If you were to choose a program or source of education, the Kahn Academy should be it. Sal replaces classical ostentation with simplicity and intuition – what more could you ask for. I’ve learned probably about 25 times as much from the Kahn Academy than I have from 12 years of conventional schooling, easily.

[Oneworld87]

@MarvelsofaLifetime Traditional school is mean't to weed out all the dumb students whilst those who pass thrive in their appropriated professions (i.e. it's natural selection).

[MisterZimbabwe]

@Oneworld87 by that logic, the public education system should've died out a looooong time ago. Teachers Union is proof of my claim.

[mustafainksa]

I just subscribed,,,,,I do thank you So very much for all your vivid vids

[BringBack500s]

Excellent as always, clear, made as simple as it needs to be to get to the result, and several ways to represent the problem.

[ChessNetwork]

Nicely explained. :)

Thumbs up!

[FHomeBrew]

if a³ can be written as a×a×a, then how do we write sqrt(a) and a^a?

[schlynn]

@FHomeBrew Square root is a^(1/2). a^a is a product series from n=1 to n=a of just a. A question you should be asking is what is a^(-2). It's just the multiplicative inverse of a^2.

[FHomeBrew]

@schlynn I know sqrt(a) = a^½ but how would you go about writing it down? I'm not asking about the math involved, I'm curious about how to write it.

Maybe define b² = a, thus sqrt(a) = b and thus we can write sqrt(a) as just b and later on we can write a as b×b again as separate terms.

As for a^a, I'd put it in two lines:

a^a = a × a × a .... a × a × a

with { length of a terms }

Or something. But then again, what if a = sqrt(2)×9^9 :s

[Sensei8686]

@FHomeBrew

547895309.9 :>

[fire9132]

@FHomeBrew

a^a would be written something like this

a*a*a*a*a.......a

i "THINK" i'm not completely sure