Answer
$x=10$ or $x=-18$
Work Step by Step
$x^2+8x=180$
$x^2+2*x*4+16=180+16$
$(x+4)^2=196$
$(x+4)^2=14^2$
$x+4= \pm 14$
$x+4=14$ or $x+4=-14$
$x=10$ or $x=-18$
Algebra 1: Common Core (15th Edition)
by Charles, Randall I.
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 - Lesson Check - Page 579: 1
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