SOLUTION: Factor 12x^2-16x-60 I got to this point- 4(3x^2-4x-15) The teacher wants us to now take it a form of 4( )( ) and i am not sure what to do next.

SOLUTION: Factor 12x^2-16x-60 I got to this point- 4(3x^2-4x-15) The teacher wants us to now take it a form of 4( )( ) and i am not sure what to do next.

Algebra.Com

Question 289878: Factor 12x^2-16x-60
I got to this point- 4(3x^2-4x-15)
The teacher wants us to now take it a form of 4( )( ) and i am not sure what to do next.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
3*(-15)=-45
we want factors of -45 which add up to -4
5 -9
3x^2-4x-15
we are un FOILing
factor by groups
3x^2+5x-9x-15
x*(3x+5)-3*(3x+5)
(3x+5)*(x-3))
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