Answer
a) $3xy+3x^2$
b) $3x(x+y)$
Work Step by Step
a) We write the area of the shaded blue region as the sum of the $4$ blue areas:
$$3xy+x(3x)=3xy+3x^2.$$
b) We factor the expression:
$$3xy+3x^2=3x(x+y).$$
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 - Section 5.6 - A General Factoring Strategy - Exercise Set - Page 379: 83
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