SOLUTION: Hello, Factoring help please. 21x^2-23x-20 = 4x^2-13x+10 = 12x^2-24x-15 = 8y^2+30y-27 = Thank You!

Question 249502: Hello,
Factoring help please.
21x^2-23x-20 =
4x^2-13x+10 =
12x^2-24x-15 =
8y^2+30y-27 =
Thank You!
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
4x^2-13x+10
4*10=40
-8 & -5 are the 2 factors of 40 whose sum is -13
=4x^2-8x-5x+10
=4x(x-2)-5(x-2) factor by grouping.
=(4x-5)(x-2)
.
Ed
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