1.

Subtract 4a2 - 11ab + 7b2 from 6ab - 4a2 - 8b2

A. -5ab - 15b2
B. 8b2 - 17ab + 15b2
C. - 15b2 + 17ab - 8a2
D. 5ab + b2
Answer» D. 5ab + b2


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