How do you factor this? I tried adding in a and grouping, but that didn't work out. The other group can't factor out to ...

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- Nov 1st 2012, 07:19 PMNervousFactoring help, again...

How do you factor this? I tried adding in a and grouping, but that didn't work out. The other group can't factor out to ... - Nov 1st 2012, 07:22 PMchiroRe: Factoring help, again...
Hey Nervous.

Try factoring the quadratic by getting the roots through the quadratic formula. - Nov 1st 2012, 07:51 PMNervousRe: Factoring help, again...
I thought quadratics were only second degree polynomials...?

EDIT: Ohhhhh I get it, you meant the first trinomial... OK... - Nov 1st 2012, 07:52 PMHallsofIvyRe: Factoring help, again...
Why in the world would you first

**multiply**and then factor? You start with so obviously,**one**factor is x- 2. In order to factor into factors with**integer**coefficients, I would note that 5 factors only as 1(5) but neither 5-1 nor 5+ 1 is equal to 2 so we**can't**factor with integer coefficients. Not every quadratic can be factored with integer (or even real) coefficients.

So instead,**complete**the square! so that . Now use the identity . - Nov 1st 2012, 07:56 PMNervousRe: Factoring help, again...
That's a beautiful idea... God, I still have so much to learn...

- Nov 2nd 2012, 06:20 AMNervousRe: Factoring help, again...
Another one:

I tried grouping, I tried factoring out an x and using quadratic formula on I don't know how to do this one. - Nov 3rd 2012, 07:57 AMNervousRe: Factoring help, again...
- Nov 3rd 2012, 04:16 PMtopsquarkRe: Factoring help, again...
Have you tried the "Rational Root Test?"

-Dan