As I mentioned in another post I'm trying to keep up with my math class and since I didn't finish high school theres some things I have to learn on my own. Heres a few things that I didn't figure out in the class. This is in chronological order, things are gradually getting more complex so I'd better keep up now if I'm gonna have any chance of doing well when it gets hard. We're still in the warmup period.(adsbygoogle = window.adsbygoogle || []).push({});

1.) Unsquaring short equations

Q.) (2A + B)sq A.) 4Asq + Bsq + 4ab

I would have just answered it 4Asq + Bsq I have no idea where the 4ab comes from.

2.) Turning equations with x to the power of 3 into quadratic equations

I'm fairly lost here. Heres an example question.

Q.) Xcubed + 5Xsq - 12X - 16 divided by X + 1

I know how to do the division but I'm wondering what its all about. The aim seems to be to turn this cubed equation into a simpler quadratic equation. To do this can I just divide any of its factors into it?

3.) Even harder cubed equations. The teacher started throwing the coefficient "K" into the equations. Example:

Q.) 2Xcubed - Xsq + KX - 12 divided by 2X + 1

I have no idea what to do with this K

4.) Finding the coefficients of a cubed equation instead of X. Example

Q.) Find A and B, factors are X - 1 and X - 2. Equation = Xcubed + AXsq - 7X + B

I'm having trouble keeping up with the class because when I take time to go over one thing he moves onto another and I gradually fall behind more and more so I have to figure out as much of my notes as I can when I go home. One problem is I don't know the language of math so I have trouble searching for help on certain things I'm having trouble with. I'm glad theres forums like this around.

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# Homework Help: A few areas of algebra I don't understand

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