SOLUTION: Factor completely. 20x^2 � 3x � 9

Question 177639: Factor completely. 20x^2 � 3x � 9
Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!
We 1st need to multiply �c� by �a,� which gives us � 9 x 20 = - 180
Now, we need to find 2 factors that when multiplied, they give us � 180, and when added, they give us � 3 (�b�). These 2 factors are: - 15 and 12

We then use the GCF of each binomial to factor each one, starting with the 1st
5x(4x - 3) + 3(4x - 3). Make sure that the two binomials, in parentheses (4x � 3), are equal.

Therefore, the factors are: (5x + 3)(4x - 3)

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