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: 70



Work Step by Step

$a=1,b=-6,c=9$ $ b^{2}-4ac\qquad$ ...substitute $1$ for $a,\ -6$ for $b$ and $9$ for $c$. $=(-6)^{2}-4\cdot 1\cdot 9\qquad$ ...evaluate $(-6)^{2}$ $=36-4\cdot 1\cdot 9\qquad$ ...multiply before subtracting $=36-36$ $=0$
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