Answer
2
Work Step by Step
$(x-7)^2=(x+3)^2$
(x-7) = +(x+3) or -(x+3)
if x-7 = x+3, that would imply -7=3 which is not possible
if x-7 = -(x+3)
2x = 4
x = 2
Algebra and Trigonometry 10th Edition
by Larson, Ron
Published by
Cengage Learning
ISBN 10:
9781337271172
ISBN 13:
978-1-33727-117-2
Chapter 1 - 1.4 - Quadratic Equations and Applications - 1.4 Exercises - Page 110: 31
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