Answer
$-x^{10}y^{20}$
Work Step by Step
By raising each factor to the power, and multiplying the exponents, we have
$$(-x^2y^4)^5=(-1)^5x^{10}y^{20}=-x^{10}y^{20}
.$$
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 5.4 - Multiplication of Monomials - Exercise - Page 224: 38
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