Answer
$7y^{2}-12y-3$
Work Step by Step
$(6y^{2}-6y+4)-(-y^{2}+6y+7)$
$=6y^{2}-6y+4+y^{2}-6y-7$
Combine like terms.
$=6y^{2}+y^{2}-6y-6y+4-7$
$= 7y^{2}-12y-3$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Section 5.3 - Polynomials and Polynomial Functions - Exercise Set - Page 279: 49
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