Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 9 - Roots and Radicals - Chapters 1-9 Cumulative Review Problem Set - Page 432: 10



Work Step by Step

Substituting $x=5$ and $y=-2$, the given expression, $ x^2-2xy+y^2 ,$ evaluates to \begin{array}{l} (5)^2-2(5)(-2)+(-2)^2 \\\\= 25+20+4 \\\\= 49 .\end{array}
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