(y分之x-x分之y)÷(x y)-搜答案-智慧作业帮

【x-y-(x-y分之4y平方)】【x+y-(x+y分之4x平方)】除以【3(x+y)-x-y分之8xy】=（x-y-x+4y)(x+y-x-4x/y)/(3x+3y-x-8x)=3y*(y-4x/y

答案是零,左边约分剩下x/y

（x的平方-y的平方)分之2xy+(x+y)分之x-(y-x)分之y=（x的平方-y的平方)分之2xy+(x+y)分之x+(x-y)分之y=(x²-y²)分之[2xy+x(x-y)

=(2X/3Y)*(3X/4Y)*(4/xy)=(2x*3x*4)/(3y*4y*xy)=2x/(y^3)

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

=(xy-x的平方）除以(x的平方-2xy+y的平方\xy)乘以(x-y\x的平方)=-x（x-y）×xy/（x-y）2×（x-y）/x2=-y再问：嗯

原式=x/(x-y)+y³/x(x-y)²÷[-y(x+y)/(x+y)(x-y)]=x/(x-y)-y³/x(x-y)²×(x-y)/y=x/(x-y)-y&

最简公分母是2(x+y)²(x-y)/2x+2y=(x-y)/2(x+y)=(x-y)(x+y)/2(x+y)²xy/(x+y)²=2×xy/2(x+y)²=2

1除以（1-根号下xy)

x²+y²+2xy分之x²-4y²÷x²+xy分之2y+x=(x+2y)(x-2y)/(x+y)²×x(x+y)/(x+2y)=x(x-2y

1、(xy分之x²-y²)×(x-y分之x)-(y分之x)；=(x+y)(x-y)/xy×x/(x-y)-x/y=(x+y)/y-x/y=(x+y-x)/y=12、6xy²

原式=xy/(x-y)(x+y)÷(2y)/(x-y)(x+y)=x/2再问：再问：

(x-y)/(x+y),x/(x²+xy)=1/(x+y),y/(x²-y²)=y/(x+y)(x-y)分母的最小公倍数是(x+y)(x-y)通分得：(x-y)/(x+y

原式=(x+y)²/y(x-y)*(x-y)²/y(x+y)=(x+y)(x-y)/y²=(x²-y²)/y²

（xy-x²）乘（x-y）分之xy=-x(x-y)乘[(x-y)分之xy]=-x²y

中间是÷?再问：不是，写错了，是分解应试再问：（x²分之x²-xy）÷（y分之x-x分之y)再答：这是计算吧，怎么可能是因式分解再问：那你按计算做再答：原式=【x²分之x

（1）（2）(x-1分之x+2)+(x-1分之-3)=2乘以x-1得x+2-2=2x-2x-2x=-2x=2（3）(x+2分之1)+(x分之1)=x²+2x分之32乘以x(x+2)得x+x+

干什么?计算吗?原式=x/y(x²-y²)/(xy)-(xy-y²)/(xy-x²)=(x²-y²)/(xy)-y(x-y)/[x(y-x)

x-1分之y= 分之xy-y

分子上应写：（x-1）²或者x²-2x+1再问：怎么书面表达呢？能否详细一些，谢谢再答：希望你及时采纳！！！！！