方程,-3x +12x-9=0可以化为：x - 4x + 3 = 0 (x - 3)(x - 1) = 0 x - 3 = 0 或 x - 1 = 0 X1 = 3 ,X2 = 1 用因式分解法简便
-3x2+12x-9=0,一元二次方程,
方程,-3x +12x-9=0可以化为：x - 4x + 3 = 0 (x - 3)(x - 1) = 0 x - 3 = 0 或 x - 1 = 0 X1 = 3 ,X2 = 1 用因式分解法简便