Posted by **Ariel** on Wednesday, March 27, 2013 at 6:39am.

(2x+1)(x-5)-(4x+2)(3x+7)+(1+2x)

- Math -
**Reiny**, Wednesday, March 27, 2013 at 8:37am
= 2x^2 - 10x + x - 5 -(12x^2 + 28x + 6x + 14) + 1+2x

= -10x^2 - 41x -18

- Math -
**Jim**, Wednesday, March 27, 2013 at 8:48am
Is that factorization?

- Math -
**Reiny**, Wednesday, March 27, 2013 at 9:37am
no, what I did is called expanding.

(x+1)(x-2) = x^2 - x - 2 ------> expanding (take brackets away)

x^2 - x - 2 = (x+1)(x-2) ------> factoring (put brackets in)

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