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OpenStudy (anonymous):
Combine like terms . (-3y^2-7y-9)-(4y^2+6y+9) A.y^2-y B.-9y^2-11y-18 C.7y^2+13y+8 D.-7y^2-13y-18
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OpenStudy (anonymous):
D
OpenStudy (swag):
d
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