Answer
$$-36 x^2+48y^2.$$
Work Step by Step
We simplify by removing the parentheses and then
combining the like terms as follows:
$$ -12(3x^2 - 4y^2)=-36 x^2+48y^2.$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 5 - Section 5.2 - Simplifying Algebraic Expressions - Exercise - Page 218: 61
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