通分:x y分之1与x-y分之1
来源:学生作业帮助网 编辑:作业帮 时间:2024/04/26 06:10:38
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
1/(x-y)=(x+y)/(x²-y²)(xy+y²)/(x²-y²)=(xy+y²)/(x²-y²)
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)
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
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)
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
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
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)
(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
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)/
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
(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)
兄弟啊,你这题是不是1/(2X+2)+1/(x²+x)?如果是,那原式=1/2(x+1)+1/x(x+1)=(x+2)/2x(x+1)
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!!!!!
解最简公分母为x(x-y)(x+y)∴1/(x²-y²)=x/x(x²-y²)=x/x(x-y)(x+y)1/(x²+xy)=(x-y)/x(x+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