Answer
$(5y+2)(3y-4)$
Work Step by Step
For the polynomial
$$
15y^2 -14y -8
$$
we check the factors of $ac=15(-8)=-120$. The only factors that can give the right middle term are $6$ and $-20$, as follows
$$
15y^2 -14y -8=(5y+2)(3y-4)
.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 10 - Section 10.6 - Factoring General Trinomials - Exercise - Page 356: 25
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