Add the polynomials. Express your answer in standard form.(8x2 - xy - y2) + (x2 + 5xy + 9y2)
A. 7x2 - 6xy - 10y2
B. 9x2 + 4xy + 8y2
C. 8x2 + 5xy + 9y2
D. 9x2 + 6xy + 10y2
Answer: B
Mathematics
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Mathematics