(-3x²)·(1/3xy²)=
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(-3x²)·(1/3xy²)=
(-3x²)·(1/3xy²)=
(-3x²)·(1/3xy²)=
-x³y²
(-3x²)·(1/3xy²)=
(-3x²)·(1/3xy²)
整式乘法..1.3xy(x²y-xy²+xy)-xy²(2x²-xy+2x)2.(x-1)(x²-4x+3)-x(x²-5x+2)
X²+xy²-x²-y²-3xy+2x+2y-1分解因式
(-3x²y)(1/3xy²)答案?
1 3x²+4xy-y²=2 4xy+1-4x²-y²=
(5x²y-2xy²-3xy)-(2xy+5x²y-2xy²),x=-1/5,y=-1/3
先化简,再求值:3xy²(-x²y+2x³y²)-4xy(-xy²)·2x²y.其中x=-3,y=1/3.
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