(x1-1分之x1)-(x2-1分之x2)怎么变形

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/03 22:30:00
(x1-1分之x1)-(x2-1分之x2)怎么变形

(x1-1分之x1)-(x2-1分之x2)怎么变形
(x1-1分之x1)-(x2-1分之x2)怎么变形

(x1-1分之x1)-(x2-1分之x2)怎么变形
通分
=[x1(x2-1)-x2(x1-1)]/(x1-1)(x2-1)
=(x1x2-x1-x1x2+x2)/(x1x2-x1-x2+1)
=(x2-x1)/(x1x2-x1-x2+1)
=±√[(x1+x2)²-4x1x2]/[x1x2-(x1+x2)+1]