化简求值(x y)(x-y)-(x-2y)的平方-(6x的平方y-2xy的平方)-搜答案-智慧作业帮

x^2+2xy+y^2/x^2-y^2除以x^2+xy/xy-y^2=(x＋y)²／(x＋y)(x－y)÷x(x＋y)／y(x－y)=(x＋y)／(x－y)×y(x－y)／x(x＋y)=y／

(x-2)²+∣y-3∣=0(x-2)²=0,∣y-3∣=0x=2y=3(x-y)/(x²-2xy+y²)-(xy+y²)/(x²-y

(2x²y-2xy²)-【(-3x²y²+3x²y)】=2x²y-2xy²+3x²y²-3x²y=-

3x²y-[2xy²-2(xy-3/2x²y)+xy]+3xy²=3x²y-2xy²+2xy-3x²y-xy+3xy²=

(xy-x的平方）除以xy分之x的平方-2xy+y的平方乘x的平方分之x-y=x(y-x)*xy/(x-y)²*（x-y）/x²=-y再问：不好意思，打错了(xy-y的平方）除以x

[（xy-2)²+4xy-4]÷(xy)=(x²y²-4xy+4+4xy-4)÷(xy)=x²y²÷xy=xy=10×1/25=2/5

xy-2{xy-[3x²y-(xy²+0.5xy)]+4x²y}=xy-2[xy-(3x²y-xy²-0.5xy)+4x²y]=xy-2(x

先化简在求值(-1/3XY)²×[xy(2x-y)-2x(xy-y)²],=1/9x²y²*(2x²y-xy²-2x²y+2xy&

化简求值：(x+y)(x-y)-(x-y)²-6x²y÷2y+(2xy)²÷(-4xy)=(x-y)²-(x-y)²-3x²-1/2y=-3

解3x²y-[2xy-2(xy-3/2x²y)+xy]+3xy²=3x²y-(2xy-2xy+3x²y+xy)+3xy²=3x²y

6xy+7y）+【8x-（5xy-y+6x）】=xy+8y+2x=xy+2(4y+x)=5-2=3

√x^-2xy+y^2+x^2-6xy+9y^2/x-3y=√(x-y)^2+(x-3y)^2/x-3y由于y>x=y-x+x-3y=-2y=-2√5

(xy-x²)÷(x²-2xy+y²)/(x-y)×(x-y)/x²=-x(x-y)÷(x-y)²/x²=-x(x-y)×x²/(

/>1、化简[1-(2x/x+y）]÷（x²-2xy+y²/3x+3y）+（x²+xy/x²-y²）=[(x+y)/(x+y)-(2x)/(x+y)]

2（x²y+xy）-3（x²y+xy）-4x²y=-（x²y+xy）-4x²y=-5x²y-xy=-xy（5x+1）=1×2（-5+1）=-

x,y都可以解出来了还问

（负三分之一xy）²[xy（2x-y）-2x（xy-y²）]=1/9x²y²(2x²y-xy²-2x²y+2xy²)=1

(x+y)(x-y)-(x-y)²-6x²y/2y+(2xy)²/(-4xy)=x²-y²-x²+2xy-y²-3x²-

(x+y)(x-y)-(x-y)²-6x²y除2y+(2xy)²除(-4xy)=x²-y²-x²+2xy-y²-6x²-

(3x-2y+3xy）-（x-4y-2xy）=3x-2y+3xy-x+4y+2xy=2x+2y+5xy=2(x+y)+5xy=2*3+5*(-2)=6-10=-4