Arrange in descending powers of x.2x + 12x3 - 18 - 16x7 - 7x2
A. 2x7 + 12x3 - 18x2 - 16x - 7
B. -18 + 2x - 7x2 + 12x3 - 16x7
C. 2x - 7x2 + 12x3 - 16x7 - 18
D. -16x7 + 12x3 - 7x2 + 2x - 18
Answer: D
Mathematics
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