Answer
$ 2$
Work Step by Step
$(x+7)(x-1)=(x+1)^2$,
$x^2-x+7x-7=x^2+2x+1$,
$4x=8$, thus $x=2$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Appendix A - Review - A.8 Solving Equations - A.8 Assess Your Understanding - Page A70: 25
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