Answer
$x^2+2x+2xy+2y+y^2+1$
Work Step by Step
$(x + y + 1)^2$
$=(x + y + 1)(x + y + 1)$
$=x^2+xy+x+xy+y^2+y+x + y + 1$
$=x^2+2x+2xy+2y+y^2+1$
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: 79
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