Arrange in descending powers of x.x2y2 + x3y - xy3 + 4
A. 4 - xy3 + x2y2 + x3y
B. x3y + x2y2 - xy3 + 4
C. 4 + x3y + x2y2 - xy3
D. -xy3 + x2y2 + x3y + 4
Answer: B
Mathematics
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