在讨论解决一元二次方程 ax2 +bx+c=0实根问题时 ,初学这方面内容的同学们常出现各类错误 ,集中反映在忽略了方程 ax2 +bx+c=0的 a和 ,主要有如下四种情况 :一、方程有两个实根时 ,忽略 a≠ 0例 1　已知关于 x的一元二次方程 (1 - 2 k) x2- 2 k+1 x- 1 =0有两个不相等的实数根 When discussing the solution to solving the real root problem of the one-variable quadratic equation ax2 + bx + c = 0, beginners in this area often appear various errors, which are mainly reflected in the neglect of the equation ax2 + bx + c = 0 a, and mainly There are four cases: First, when the equation has two real roots, ignore a≠ 0 Example 1 Known quadratic equation about x (1 - 2 k) x2- 2 k+1 x- 1 =0 There are two Unequal real numbers