College Algebra (6th Edition)

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

Chapter P - Prerequisites: Fundamental Concepts of Algebra - Exercise Set P.1: 8

Answer

12

Work Step by Step

$x^{2}-7x+4$, for $x=8$, substitute 8 for each 'x' $8^{2}-7\times8+4$, using order of operations, complete exponents first $64-7\times8+4$, then multiplication and division in order left to right $64-56+4$, then addition and subtraction in order left to right $8+4$, any remaining addition and subtraction left to right $12$
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