分式(x y) xy平方通分-搜答案-神马作文网

x/(xy-y²)=x/[y(x-y)]y/(x²-xy)=y/[x(x-y)]∴公分母为：xy(x-y)通分后得x/(xy-y²)=x²/[xy(x-y)]y

2/xy=2(y-x)/xy(y-x)3y/(xy-x^2)=3y^2/xy(y-x)如果不懂,请追问,祝学习愉快!

(x²+xy)/(x+y)²分子提取公因式x=x(x+y)/(x+y)²分子分母同时除以（x+y）=x/(x+y)x²-y²/（x²-y&s

x-3y=0且xy≠0,所以x=3y(x≠0,y≠0)带入分式,(9y-3y+y)/(9y+3y+y)=7/13

通分为分母是（x+y)⒉(x-y),即为2xy（x-y）/（x+y)⒉(x-y)和x（x+y）/（x+y)⒉(x-y)

x-y=x/y两边同乘以y得xy-y^2=x移项xy-x=y^2即x(y-1)=y^2x=y^2/(y-1)

通分：（1）13xy

解（1）∵最简公分母是18x3y3，∴13xy3=6x23xy3•6x2=6x218x3y3，12x2y=9xy22x2y•9xy2=9xy218x3y3，19x3y=2y29x3y•2y2=2y21

(1).将y/x²-xy,x/2y-2x通分后,分别是2y/2x(x-y),-xy/2x(x-y)(2).把a/a-b,b/a+b,2/b²-a²的分母化为b²

约分(x²+xy)/(x+y)²=x(x+y)/(x+y)²=x/(x+y）x²-y²/（x²-y²）=1通分2xy/(x+y)&

x²-y²=(x+y)(x-y)所以最简公分母(x+y)²(x-y)所以2xy/(x+y)²=2xy(x-y)/(x+y)²(x-y)x/(x&sup

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

xy+x/x的平方+2x+1=x(y+1)/(x+1)^2不能继续约分了题目如果是xy+y/x的平方+2x+1=y(x+1)/(x+1)^2=y/(x+1)

(（x-y）(x-y))/((x-y)(x+y))=(x-y)/(x+y).

原式=x(x+y)分之x(x-y)=(x+y)分之(x-y)

2xy/(x+y)^2和x/(x^2-y^2)2xy/(x+y)^2=2xy(x-y)/[(x+y)^2(x-y)]x/(x^2-y^2)=x(x+y)/[(x+y)^2(x-y)](x-y)/(2x

2(x平方-6分之7y）平方分之（x-3分之2y)平方

(x²+xy)/(x+y)²=x(x+y)/(x+y)²=x/(x+y)2xy/(x+y)²x/(x²-y²)∵最简公分母为：(x+y)&#

分式ab/xy^2,bc/x(a-b),a/y(b-a)的最简公分母是：abc再问：可以写写过程吗再答：ab/xy^2=abc/xy²cbc/x(a-b)=abc/ax(a-b)a/y(b-

看不懂你的问题,不过只要分母中含字母的代数式就是分式,要看题目中的式子,不用化简后再看.