#### Answer

$$2y^{2}-2y+8$$

#### Work Step by Step

Group like terms and add:
$$(5y^{2}+7y)-(3y^{2}+9y-8)=$$
$$(5y^{2}-3y^{2})+(7y-9y)+8=$$
$$2y^{2}-2y+8.$$

Published by
Prentice Hall

ISBN 10:
0133186024

ISBN 13:
978-0-13318-602-4

$$2y^{2}-2y+8$$

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