Answer
$49x^2-42x+9$.
Work Step by Step
The given expression is
$=(7x-3)^2$
Use formula $(a-b)^2=a^2-2ab+b^2$.
We have $a=7x$ and $b=3$.
$=(7x)^2-2(7x)(3)+(3)^2$
Simplify.
$=49x^2-42x+9$
Hence, the product is $49x^2-42x+9$.
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 372: 2
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