整式乘法..1.3xy(x²y-xy²+xy)-xy²(2x²-xy+2x)2.
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整式乘法..
1.3xy(x²y-xy²+xy)-xy²(2x²-xy+2x)
2.(x-1)(x²-4x+3)-x(x²-5x+2)
1.3xy(x²y-xy²+xy)-xy²(2x²-xy+2x)
2.(x-1)(x²-4x+3)-x(x²-5x+2)
1.x^3y^2-2x^2y^3+x^2y^2
2.5x-3
再问: 给过程。谢谢
再答: 1. 3xy(x²y-xy²+xy)-xy²(2x²-xy+2x) =3x^3y^2-3x^2y^3+3x^2y^2-2x^3y^2+x^2y^2-2x^2y^2 =x^3y^2-2x^2y^3+x^2y^2 2. (x-1)(x²-4x+3)-x(x²-5x+2) =x^3-4x²+ 3x-x²+4x-3-x^3+5x²-2x =5x-3 你应该看得懂吧。。
2.5x-3
再问: 给过程。谢谢
再答: 1. 3xy(x²y-xy²+xy)-xy²(2x²-xy+2x) =3x^3y^2-3x^2y^3+3x^2y^2-2x^3y^2+x^2y^2-2x^2y^2 =x^3y^2-2x^2y^3+x^2y^2 2. (x-1)(x²-4x+3)-x(x²-5x+2) =x^3-4x²+ 3x-x²+4x-3-x^3+5x²-2x =5x-3 你应该看得懂吧。。
1-x²+2xy-y²
计算:(1).(-2xy²)*(3x²y)²
已知2x²-3y²=xy,(xy≠0),求值(4xy-x²)/(xy+2y²)的
计算:3(2x²-3xy²)-2(2xy²-3x²y)
x²-4y²/x²+2xy+y²÷x+2y/2x²+2xy
先化简,再求值:3xy²(-x²y+2x³y²)-4xy(-xy²)·
越快越好(1)(xy²+3)(xy²+3)-2x(-x+y)(2)(x+2)(x²+4)(
(x+y-2xy)(x+y-2)+(1-xy)²
先化简,再求值:(x²)/(x²-2xy+y²)÷(x²+2xy+y²)/(x&
3x²-4xy+y²
因式分解 x²-3xy+2y²+x-2
(x+2y)²-x²-2xy