Answer
$=x^2+4x+2xy+4y+y^2+4$
Work Step by Step
$(x + y + 2)^2$
$=(x + y + 2)(x + y + 2)$
$=x^2+xy+2x+xy+y^2+2y+2x+2y+4$
$=x^2+4x+2xy+4y+y^2+4$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.4 - Polynomials - Exercise Set - Page 56: 80
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