Question

配方法求5x=3x²-1

Answer 1

3x²-5x=1

x²-5x/3=1/3

x²-5x/3+25/36=1/3+25/36=37/36

(x-5/6)²=(±√37/6)²

x-5/6=±√37/6

x=5/6±√37/6

x=(5-√37)/6,x=(5+√37)/6