Samuel W.

# needing help

how would i factor
9x^2-36
x^2-11x+24.

which ones are
factor by grouping
product sum
(x-12)(x-2)
9(x-2)(x+12)
(x-4)(x+4)

## 2 Answers By Expert Tutors

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Samuel W.

i was asking which definition goes to the equations. Sorry about that
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11/12/13

Jason S.

Nataliya D. was correct on the first one.  I didn't factor out the 9 first.

The correct answer was 9(x-2) (x+2).

9x^2-36 = (3x+6) (3x-6) = 3(x+2)(3)(x-2) = 9(x-2)(x+2)

Or the best way 9(x^2-4) = 9(x-2)(x+2).

My apologies that in my haste I didn't COMPLETELY factor the expression.
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11/13/13

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