[交流] 求助初中数学题有理数无理数

2楼: Originally posted by alober at 2017-08-22 11:40:21
\text{formula} = \frac{(x^2+y^2+z^2-xy-yz-zx)^2}{((x-y)(y-z)(z-x))^2}, \sqrt{\text{formula}} = \left|\frac{x^2+y^2+z^2-xy-yz-zx}{(x-y)(y-z)(z-x)}\right|