Level 1 multiplying expressions

[jybq6r]

the truth is i liked this section &benfited 50%becous my memory is weak in substance math thanQ

[CyberTallon]

I just wanted to thank you, khanacademy, for helping me via these lessons. They are such a lifesaver for someone like myself, who has been out of practice for so long that I pretty much forgot how something as simple as this worked. The people I expressed concern to regarding this told me its like riding a bike and that I would pick up right where I left off without a hitch. In a way, they were right - because after seeing these videos my memory of these lessons has come back. Thank you so much!

[paulceltics]

someone is a sucker

[Mr1591]

thnx so much your a lif saver

[melanoonie2004]

thank u

[Wafflesmart]

cool! thanks!!!!!!!

[baseballkid077]

you could've said everything you just said with one word... foil. first, outer, inner, last.

[BoleynChic]

Is there a way I can understand how to factor out trinomials with the form of ax^2 + bx + c?

[xemily91]

@BoleynChic: you have to factor that differently. wish i could explain it, but i think he has one. :)

[chickenparrot]

hey what about (x+1)^3

that might help a bit

[imggine1111]

you'r the best

[Jayhawkblue]

you are a great teacher

[chopperhead2011]

I was watching one of your derivates videos and I was thrown off when you said that "((x+h)^2-x2)/h=(x^2+2xh+h^2)/­h=2x+h but this explains it. Every problem I have in one of your videos, I can find a solution in another video XD

[Raziaar]

I always love your videos. They make learning this stuff much more fun than when I was in school many years ago. If I had you as a teacher then, perhaps I would have been rapt and did my homework!