x+y/x-y和y+x/y-x通分
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/14 01:43:22
![x+y/x-y和y+x/y-x通分](/uploads/image/z/10433792-56-2.jpg?t=x%2By%2Fx-y%E5%92%8Cy%2Bx%2Fy-x%E9%80%9A%E5%88%86)
x)ЮԯЭ|:RBReìm6IE8l Jjk 5muZM_. fV}SΪ(5 0B
@ާzdRfͧC4
3R1gu
0FqF&ڕqF {tA,<;_m\ &ulyںg3C܍0
x+y/x-y和y+x/y-x通分
x+y/x-y和y+x/y-x通分
x+y/x-y和y+x/y-x通分
(x+y)/(y-x)=-(x+y)/(x-y)
移项
{(x+y)+(x+y)}/(x-y)=0
2(x+y)/(x-y)
分子分母同乘以(x+y)得
2(x+y)^2 /(x-y)(x+y)
化简得
(2x^2+4xy+y^2)/(x^2-y^2)
(x+y)/(y-x)=-(x+y)/(x-y),
∴公分母是(x-y)