Answer
$-x^2-6xy-2y^2$
Work Step by Step
$(3x^2 -7xy+7y^2)-(4x^2 -xy+9y^2)$
$=3x^2 -7xy+7y^2-4x^2 +xy-9y^2$
$=3x^2 -4x^2-7xy +xy+7y^2-9y^2$
$=-x^2-6xy-2y^2$
Algebra: A Combined Approach (4th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321726391
ISBN 13:
978-0-32172-639-1
Chapter 5 - Review - Page 405: 77
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