分式通分1 3x平方与5 12xy最简公分母-搜答案-大师作文网

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

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)

问老师吧,这样比较可靠

1/(x²+2x)+1/(x²-x)=1/x(x+2)+1/x(x-1)=(x-1)/x(x+2)(x-1)+(x+2)/x(x+2)(x-1)通分后分母是x(x+2)(x-1)

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)

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

解最简公分母2(x+y)²,∴(x-y)/(2x+2y)=(x+y)(x-y)/2(x+y)²=(x²-y²)/2(x+y)²xy/(x+y)

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

3y与2y²的最简公分母是6y²3y分之x=x/(3y)=(2y×x)/(2y×3y)=(2xy)/(6y²)2y平方分之3x=3x/(2y²)=(3×3x)/

(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-

x的平方-y的平方分之1=(x+y)(x-y)分之1x的平方+xy分之1=x(x+y)分之1提取(x+y)分之1,就可

公分母是2(x+y）^2(x-y)/(2x+2y)=(x-y)*(x+y)/2(x+y)*(x+y)=(x^2-y^2)/2(x+y)^2xy/(x+y)^2=2xy/2(x+y)^2