Answer
$x = 10, -18$
Work Step by Step
$x^2+8x=180$
$x^2+8x+(8/2)^2=180+(8/2)^2$
$x^2+8x+16 = 180+16$
$(x+4)(x+4)=196$
$\sqrt {x+4} = \sqrt {196}$
$x+4 = 14$ or $x+4 = -14$
$x+4 = 14$ or $x+4 = -14$
$x = 10, -18$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 9 - Quadratic Functions and Equations - 9-5 Completing the Square - Lesson Check - Page 564: 1
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