Posted by **Cole** on Tuesday, October 11, 2011 at 5:15pm.

I'm doing quadratic equations x^2 +bx+c =0.I'm supposed to factor each polynomial. I know how to questions like x^2 +8x +12 =0 but this one says, j^2-9jk-10k^2. I'm confused

- Alg 1 -
**bobpursley**, Tuesday, October 11, 2011 at 5:22pm
j^2-9jk-10k^2

what adds to 9, multiplies to 10: 10,1

(j-10k)(j+k)

your teacher is just too easy.

- Alg 1 -
**Cole**, Tuesday, October 11, 2011 at 5:23pm
I'm in the ninth grade and not the smartest community

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