Question

多項(xiàng)式2x3y+

1

2

y-

1

3

xy2-5x2按x的降冪排列為_(kāi)_____．

Answer 1

多項(xiàng)式2x3y+

1

2

y-

1

3

xy2-5x2按x的降冪排列為2x³y-5x²-

1

3

xy²+

1

2

y．
故答案為：2x³y-5x²-

1

3

xy²+

1

2

y．