Combine like terms and write the resulting polynomial in descending order of powers.6x4 + 6x3 - 8x2 - 6 + 9x4 - 3x3 - 2x2 - 9
A. 15x8 + 3x6 - 10x4 - 15
B. 15x4 + 3x3 - 10x2 - 15
C. -9x4 - 9x3 - 3x2 + 15
D. 8x18 - 15
Answer: B
Mathematics
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= 6
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Z = 400 ê, R = 200 ê, find x.
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