Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 4 Quadratic Functions and Factoring - 4.7 Complete the Square - 4.7 Exercises - Mixed Review - Page 291: 69



Work Step by Step

$a=2,b=7,c=5$ $ b^{2}-4ac\qquad$ ...substitute $2$ for $a,\ 7$ for $b$ and $5$ for $c$. $=7^{2}-4\cdot 2\cdot 5\qquad$ ...evaluate $7^{2}$ $=49-4\cdot 2\cdot 5\qquad$ ...multiply before subtracting $=49-40$ $=9$
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