通分y-x分之1与2x+2y分之1
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1/(x-y)=(x+y)/(x²-y²)(xy+y²)/(x²-y²)=(xy+y²)/(x²-y²)
x-y/2x+2y=(2x^2-y+2xy)/2x=(2x^2-y+2xy)(x+y)^2/2x(x+y)^2xy/(x+y)^2=2x*xy/2x(x+y)^2
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)
最简公分母是xy(x-y)∴2x+2y/x-y=xy(2x+2y)/xy(x-y)(x+y)²/xy=(x+y)²(x-y)/xy(x-y)再问:那么x-y/2x+2y与xy/(x
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)x/(x^2+2xy+y^2)与y/(x+y)x/(x+y)²与y(x+y)/(x+y)²(2)(x+4)/(x^2+4x)与(x-5)/x(x-5)-2(x-5)(x+4)
(x-y)/(2x+2y)=(x-y)/2(x+y)=(x-y)(x+y)/2(x+y)²=(x²-y²)/2(x+y)²xy/(x+y)²=2xy/
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
2x+2y=2(x+y)所以最简公分母是2(x+y)²所以(x-y)/(2x+2y)=(x+y)(x-y)/[2(x+y)²](xy)/(x+y)²=2xy/[2(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)/
第一个式子上下同乘x-y得2x平方y-2xy平方/(x+y)(x平方-y平方)第二个式子上下同乘x+y得x平方y/(x+y)(x平方-y平方)分母一样了
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
解x/y=3∴x=3y∴(x²+xy)/y²=(9y²+3y²)/y²=12y²/y²=12最简公分母(x-1)²(x+
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-y)/(2x+2y)=(x-y)/2(x+y)=(x-y)(x+y)/2(x+y)^2xy/(x+y)^2=2xy/2(x+y)^2x-y/2x+2y=(x^2-y+4xy)/2x=(x^2-y
(4-x的平方)分之(x的平方-2x)=x(x-2)/-(x+2)(x-2)=-x/(x+2)通分(y-x)分之1=2(x+y)(y-x)分之2(x+y)与(2x+2y)分之1=2(x+y)(y-x)
(x-y)/(2x+2y)=(x-y)/2(x+y)=(x-y)(x+y)/2(x+y)^2xy/(x+y)^2=2xy/2(x+y)^2x-y/2x+2y=(x^2-y+4xy)/2x=(x^2-y
2xy/(x+y)^2=2xy(x-y)/[(x-y)(x+y)^2]
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