Answer
$x^2-9y^2$.
Work Step by Step
The given expression is
$=(x+3y)(x-3y)$
Use sum and difference pattern $(a+b)(a-b)=a^2-b^2$.
We have $a=x$ and $b=3y$.
$=(x)^2-(3y)^2$
Simplify.
$=x^2-9y^2$
Hence, the product is $x^2-9y^2$.
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 - 7.3 - Special Products of Polynomials - Monitoring Progress - Page 373: 7
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