Answer
$(6a-5)(2a-3)$
Work Step by Step
For the polynomial
$$
12a^2 -28a +15
$$
we check the factors of $ac=12(15)=180$. The only factors that can give the right middle term are $-18$ and $-10$, as follows
$$
12a^2 -28a +15=(6a-5)(2a-3)
.$$
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: 18
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