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September 18, 2014

September 18, 2014

Posted by **Catherine** on Sunday, March 3, 2013 at 12:42pm.

-12x^2 - 35x - 18

Thanks!

- Math -
**Dr. Jane**, Sunday, March 3, 2013 at 12:49pmIf you factor by the guess method..

First remove the negative sign. Factor out a negative 1.

-1(12 x^2 + 35x +18)

Now, work with the 12x^2 + 35x+18

Think of multiplying binomials

(12x + ?)(x + ?)

(3x + ?)(4x+ ?)

(2x + ?)(6x + ?)

What can the ? be...

18, 1

9, 2

3, 6

You have to try all of these possibilites. Check by multiplying binomials. The hint is that you are trying to get 35x for the middle term.

Once you get your factors, don't forget to put the -1 out in front.

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