Intermediate Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-894-7
ISBN 13: 978-0-13417-894-3

Chapter 1 - Section 1.1 - Algebraic Expressions, Real Numbers, and Interval Notation - Exercise Set: 21

Answer

$10$

Work Step by Step

Substitute $7$ for $x$ to obtain: $=7^2-6\cdot 7 +3$ Apply the exponent first to obtain: $=49-6\cdot 7+3$ Perform multiplication next: $=49-42 + 3$ Perform subtract first and then addition: $=7 + 3 \\=10$
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