SOLUTION: 15a^2-65a-50

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Question 435546: 15a^2-65a-50
Answer by edjones(8007) About Me  (Show Source):
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15a^2-65a-50
=5(3a^2-13a-10)
3*-10=-30. the two factors of -30 whose sum is -13 are +2 and -15.
=5(3a^2+2a-15a-10)
=5(a(3a+2)-5(3a+2)) Factoring by grouping.
=5(a-5)(3a+2)
.
Ed