Perform the indicated operations. Write the resulting polynomial in standard form.(-8x9 + 2x8 - 4x7 - 5) + (6x9 + 7x8 - 8x7 + 9)
A. -2x9 + 9x8 - 12x7 + 4
B. 14x9 + 5x8 - 4x7 + 4
C. 14x9 + 5x8 - 4x7 + 14
D. -2x9 + 5x8 - 4x7 + 14
Answer: A
Mathematics
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