Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.3 - Algebraic Expressions - 1.3 Exercises: 57

Answer

$a-b^{2}$

Work Step by Step

Change square roots into exponents: $(a^{1/2}-b)(a^{1/2}+b)$ Use the rule $(A+B)(A-B)=A^{2}-B^{2}$ to multiply. $a^{1/2}a^{1/2}-b^{2}$ Simplify: $a-b^{2}$
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