Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter R - Review of Basic Concepts - R.4 Factoring Polynomials - R.4 Exercises - Page 45: 128

Answer

See explanations.

Work Step by Step

Step 1. Adding a zero $x^2-x^2$ will not change the expression. Step 2. Use associative property of addition. Step 3. Use formula for a perfect square. Step 4. Use formula for the different of two squares. Step 5. Use commutative property of addition.
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