Answer
$9z^2-25$.
Work Step by Step
The given expression is
$=(3z-5)(3z+5)$
Use sum and difference pattern $(a-b)(a+b)=a^2-b^2$.
We have $a=3z$ and $b=5$.
$=(3z)^2-5^2$
Simplify.
$=9z^2-25$
Hence, the product is $9z^2-25$.
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 7 - Polynomial Equations and Factoring - 7.1-7.4 - Quiz - Page 384: 12
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