Answer
300
Work Step by Step
(4$\times$5)$^2$-4$\times$5$^2$
First multiply inside the parenthesis.
(20)$^2$-4$\times$5$^2$
Then solve the exponents.
(400)-4$\times$(25)
Then multiply.
400-(100)
Then subtract
300
Introductory Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-805-X
ISBN 13:
978-0-13417-805-9
Chapter 1 - Section 1.8 - Exponents and Order of Operations - Exercise Set - Page 100: 41
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