Answer
$930.25$
Work Step by Step
$30.5^{2}=(30+0.5)^{2}$
Using $(a+b)^{2}=a^{2}+b^{2}+2ab$ where $a=30$ and $b=0.5$, we have
$(30+0.5)^{2}=30^{2}+0.5^{2}+2(30)(0.5)$
$=900+0.25+30=930.25$
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 - 7.3 - Special Products of Polynomials - Exercises - Page 375: 29
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