Answer
The coefficient for $a^2$ is a perfect square (as would the coefficient for $x^2$).
Work Step by Step
$(x+a)(x+a) = x^2 + a*x+a*x + a^2 = x^2+2ax+a^2$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 8 - Polynomials and Factoring - Chapter Review - 8-7 Factoring Special Cases - Page 526: 72
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