Add and write the resulting polynomial in descending order of degree.(9x4 + 3x3 - 2x2 - 3) + (2x4 - 5x3 - 5x2 - 5)
A. 11x4 - 2x3 - 7x2 - 8
B. -8x4 - 8x3 + 4x2 + 5
C. 11x8 - 2x6 - 7x4 - 8
D. 2x18 - 8
Answer: A
Mathematics
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