Answer
$525$.
Work Step by Step
The given expression is
$=55^2-50^2$
Use special formula $a^2-b^2=(a+b)(a-b)$.
$a=55$ and $b=50$
$=(55+50)(55-50)$
Simplify.
$=(105)(5)$.
Multiply.
$=525$.
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 - 7.7 - Factoring Special Products - Monitoring Progress - Page 398: 7
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