计算(x y)的平方-2X(X y),其中X=3,Y=2
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x²-[2(2x²-xy+y²)-3(x²+xy-2y)+y²]=x²-[4x²-2xy+2y²-3x²-3x
(3x的平方+2xy-2分之1x)-(2x的平方-xy+x)=3x+2xy-x/2-2x+xy-x=x+3xy-3x/2
(1/4x的平方-xy+y的平方)/(x-2y)=1/4(x-2y)^2/(x-2y)=1/4(x-2y)=x/4-y/2
y/(x²-xy)+2/(y-x)-x/(y²-xy)=[y²+2(-xy)+x²]/(x²y-xy²)=(x-y)²/[(x-y
原式=[(x-y)²-(x²-y²)]/2xy=(x²-2xy+y²-x²+y²)/2xy=(-2xy+2y²)/2xy
x的平方+2xy+y的平方分之x的平方-4y的评方÷x的平方+xy分之x+2y=(x+2y)(x-2y)/(x+y)²×x(x+y)/(x+2y)=x(x-2y)/(x+y)=(x²
2x(-xy)^2-x^2(x^2y^2-y^2)=(xy)^2(2x-x^2+1)
x的平方+x-6/x-3/x+3/x的平方-6-x=(x+3)(x-2)/(x-3)×(x-3)(x+2)/(x+3)=(x-2)(x+2)=x²-4x的平方+2xy+y的平方/xy-y的平
原式=(1-x²y²)(x²y²+1)=(1-x四次方y四次方)请指出,希望能和你一起探讨~如果认为我的回答好,请及时采纳,
-2x²-12xy²+8xy³=-2x(x+6y²-8y³)4(x+y)²-2(x+y)=2(x+y)(2x+2y-2)2(x-y)
原式=x^2/xy-y^2/xy-[(x-y)y]/[(y-x)x]=x/y-y/x+y/x=x/y.
3x²+2x²-3x-(-x+5x²)=3x²+2x²-3x+x-5x²=-2x其中x=314时,-2x=-2*314=-6285xy-8x
x的平方-2xy/xy-2y的平方=x(x-2y)/y(x-2y)=x/y
原式(-xy/3)²*[xy(2x-y)-2x(xy-y²)]=(x²y²/9)(2x²y-xy²-2x²y+2xy²)
{4x(2xy-3xy的平方)-3x平方y(4x-5y)}÷(-0.5xy)={4x²y(2-3y)-3x²y(4x-5y)}÷(-0.5xy)=x²y[8-12y-12
原式=-x^2+2xy-y^2-2xy+6x^2+6y^2-3xy=5x^2-3xy+5y^2
=(x+y)(x+y)(x^2-xy+y^2)(x^2-xy+y^2)=(x^3+y^3)^2
(2X的平方Y-XY)乘以3XY=6X³Y²-3X²Y²
(2X平方y+3xy平方)-(6x平方-3XY平方)=2x²y+3xy²-6x²+3xy²=2x²y+6xy²-6x²
原式等于:1/[X(X+2Y)].再问:过程再答:原式等于:(x²-4y²)/(x²+4xy+4y²)÷(x²-2xy)=(x²-4y