计算[2分之1x的平方y-2xy y的平方] [-4xy]-搜答案-智慧作业帮

[3a^3/(x+y)]^3*(x^2-y^2)/[(y-x)/(x+y)]^2=27a^9/(x+y)^3*(x+y)*(x-y)*(x+y)^2/(x-y)^2=27a^9/(x-y)

(x分之x的平方-y的平方)乘以(x的平方-2xy+y的平方分之2x)其中x=2y=1=(x^2-y^2)/x*2x/(x-y)^2=(x+y)(x-y)/x*2x/(x-y)^2=2(x+y)/(x

(2x的平方分之y)的-2次方除以(-4x分之y的平方)的-2次方=4x的4次方/y²×y的4次方/16x²=x²y²/4

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

（x³＋3x²y-9xy²）-1/2（6x²y＋4x²）=x³＋3x²y-9xy²-3x²y-2x²

1;=3(x+y)/(x-y)2:x平方/(2x-1-x+1)=x3:=-(2x平方-2x-1)/(3x+1)

2x/(x^2-4)=2x/((x-2)*(x+2))最简公分母是x*(x-2)*(x+2)1/(x-1)-1/(x+1)-2/(x^+1)=(x+1-x+1)/(x^2-1)-2/(x^+1)=2/

=[x(x+y)-y(x-y)+2xy]/(x+y)(x-y)=(x²+xy-xy+y²+2xy)/(x+y)(x-y)=(x+y)²/(x+y)(x-y)=(x+y)/

x的平方-2x+1分之x-3÷x-1分之x的平方-9=[(x-3)/(x-1)²]*[(x-1)/(x+3)*(x-3)]=1/(x-1)(x+3)

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

(x^2-4y^)\(x+y)^2乘以2x(x+y)/(x+2y)=2x(x-2y)\(x+y)

[1]y+2分之y的平方-6y+9除以[3-y]=（3-y)²/(y+2)×/(3-y)=(3-y)/(y+2)[2]x的立方分之x的平方y乘以[-y分之1]=x²y/x³

1.(2x-3y)^2-(y+3x)(3x-y)=4x^2-12xy+9y^2-(3x+y)(3x-y)=4x^2-12xy+9y^2-9x^2+y^2=10y^2-5x^2-12xy2.[(x-y)

y的立方分之x的平方y÷-x分之2y=y的立方分之x的平方yX-2y分之x=-2y的立方分之x的立方

x的平方-64y的平方分之2x-x-8y分之1=[2x-(x+8y)]/(x-8y)(x+8y)=(x-8y)/(x-8y)(x+8y)=1/(x+8y)

大哥那个平方是整体的平方还是那6x-4y分之1-8y的平方,题目说清楚点

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

（xy-x的平方）÷xy分之x-y=x(y-x)*xy/(x-y)=-x^2y(x的平方+x分之4x的平方-1）乘(1-2x分之x+1)÷x分之1=[x(x+1)分之(2x+1)(2x-1)]乘(1-

*(x-2y+3分之1)的平方=x^2+(2y)^2+(1/3)^2-2x*2y+2x*(1/3)-2y*(1/3)=x^2+4y^2+1/9-4xy+(2/3)x-(2/3)y

x-y分之2x的平方-y-x分之x的平方-4xy+x-y分之2y的平方-x的平方=2x/(x-y)-(x²-4xy)/(y-x)+(2y-x²)/(x-y)=(2x+x²