Answer
$z=-13$
Work Step by Step
$z^2+26z+169=0$
$z^2+13z+13z+13*13=0$
$z(z+13)+13(z+13)=0$
$(z+13)(z+13)=0$
$z+13=0$
$z=-13$
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 11 - Rational Expressions and Functions - Get Ready! - Page 661: 11
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