[交流] 这个方程怎么解 已有24人参与

5楼: Originally posted by cooooldog at 2016-02-07 17:46:16
\left\{\quad \begin{array}{c} x_1=\frac{A\cdot\;C-\sqrt{A^2-C^2+1}}{A^2+1}\\ x_2=\frac{A\cdot\;C+\sqrt{A^2-C^2+1}}{A^2+1}\\ \end{array} \right.

3楼: Originally posted by wzt324307 at 2016-02-07 11:06:51
同意楼上，把Ax移相平方就是一元二次方程了