College Algebra (6th Edition)

Published by Pearson
ISBN 10: 0-32178-228-3
ISBN 13: 978-0-32178-228-1

Chapter P - Summary, Review, and Test - Review Exercises - Page 89: 2

Answer

Evaluating $x^{2}-5(x-y)$ for $x=6$ and $y=2$ gives $16$

Work Step by Step

Evaluate $x^{2}−5(x−y)$ if x=6 and y=2. Let's substitute the value of x and y in the given expression. if x=6 and y=2 $x^{2}−5(x−y)$ =$6^{2}−5(6−2)$ Apply the PEMDAS rule to evaluate all operations. Do the operation inside the parentheses. =$6^{2}−5(6−2)$ =$6^{2}−5(4)$ Evaluate the expression with exponent, then multiply 5 and 4. =$6^{2}−5(4)$ =$(6· 6) - 20$ Perform the operation inside the parentheses, then subtract from left to right. =$(6· 6) - 20$ =$36 - 20$ =$16$ therefore, $x^{2}−5(x−y)$ if x=6 and y=2 give 16.
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