3y分x与2y的平方分3x通分-搜答案-大师作文网

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!

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)

问老师吧,这样比较可靠

一、(6x+1)/(x^2-x+3)(4x-3)/(-x^2+x-3)=(3-4x)/(x^2-x+3)二、3x/[(x-1)(x-2)]=3x/(x^2-3x+2)(3+x)/[(x-1)(2-x)

通分1/x平方-y平方和1/x平方+xy1/x平方-y平方=x/x(x+y)(x-y)1/x平方+xy=(x-y)/x(x+y)(x-y)通分x/x平方-4和x-1/（x-2）平方x/x平方-4=x(

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)

1/(6x-4y）=1/2(3x-2y)2/(9x^2-4y^2)=2/(3x+2y)(3x-2y)然后怎么通分还是自己算算吧.

若是：①4x²-y²和②X/(3Y-6X),则公分母是3(y-6x)；若是：①1/(4x²-y²)和②X/(3Y-6X),①=1/[(2x-y)(2x+y)],

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)

两个数都是绝对值,且互为相反数,则可以得知两个式子都等于0.从而能知道x=-6,y等于三分之二.所以x+y等于负三分之十六

①：x/a(x-y)=xb/ab(x-y),y/b(y-x)=-y/b(-y)=-ay/ab(x-y)；

x/(3y)的分母是3y3x/(2y²)的分母是2y²两个分式的最简公分母是6y²,通分：x/(3y)=x×2y/(3y×2y)=2xy/(6y²)3x/(2y

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)/

x/(x+y)(x--)^3=x/(x+y)(x--y)^3y/(y+x)(y--x)^2=y(x--y)/(x+y)(x--y)^3.

1/(X-Y)与2/(X^2-Y^2)分母最小公倍数为X^2-Y^2,所以第一个分式分子分母同乘X+Y

(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)&#

解(1)：最简公分母是6(x+5)3分之x=x/3=2x(x+5)/[6(x+5)]6分之1-x=(1-x)/6=(1-x)(x+5)/[6(x+5)]x+5分之x平方-x=(x²-x)/(

|x-3|与（y+1）的平方互为相反数即|x-3|+（y+1）²=0因为|x-3|≥0、（y+1）²≥0,而它们的和为0,所以它们分别为0则x-3=0、y+1=0,那么x=3、y=

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