一元二次方程是初中代数的重难点之一 ,解答与其有关的问题时非常容易出现忽视题中的限制条件而错解或漏解。下面就学习中经常出现的几种错误举例如下 :望能引起同学们重视。一、忽视二次项系数a≠ 0而错解例 1　已知关于x的方程 (m - 2 )x2 +(2m - 1 )x +m =0有两个实数根 ,求 One-quadratic quadratic equations are one of the most difficult and difficult points in junior high school algebra. When solving problems related to them, it is very easy to ignore the limitations of the questions and misunderstood or missed solutions. The following examples of mistakes that often appear in learning are as follows: hope can cause students to pay attention. I. Ignoring the quadratic term coefficient a≠ 0 and misinterpreting the example 1 Knowing that the equation for x (m − 2) x 2 + (2m − 1) x +m =0 has two real roots,