Perform the indicated operations and write the resulting polynomial in descending order of degree.(6k3 + 3k2 - k + 9) - (4k3 - 4k2 - k - 1) + (4k3 + 5k2 - k + 1)
A. 6k3 + 12k2 - k + 11
B. 6k3 + 12k2 + k + 11
C. 6k3 - 12k2 + k + 10
D. 14k3 + 12k2 - k + 11
Answer: A
Mathematics
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