(x1-x2)+(x2-x1)/x1x2 = (x1-x2)(1- 1/x1x2)
问题描述:
(x1-x2)+(x2-x1)/x1x2 = (x1-x2)(1- 1/x1x2)
请问这是怎么变形的?
答
提取公因式(x1-x2)
(x1-x2)+(x2-x1)/x1x2 = (x1-x2)(1- 1/x1x2)
请问这是怎么变形的?
提取公因式(x1-x2)