Answer
$x^2-25y^2+6x+9$
Work Step by Step
Given:$[(x+3)+5y][(x+3)-5y]$
Apply Formula: $(a-b)(a+b)=a^2-b^2$
This implies
$[(x+3)+5y][(x+3)-5y]=(x+3)^2-(5y)^2$
or, $=x^2+9+6x-25y^2$
Hence, the result is : $x^2-25y^2+6x+9$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 5 - Review Exercises - Page 400: 26
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