Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 9 - Quadratic Functions and Equations - 9-5 Completing the Square - Practice and Problem-Solving Exercises - Page 579: 7



Work Step by Step

$x^2+18x+c$ Compare it with $ax^2+bx+c$, we have $b=18$ For perfect-square trinormal add $(\frac{b}{2})^2$Plug $b=18$ to complete the square. $c=(\frac{81}{2})^2=(9)^2=81$
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