在二次方程的有关问题的解答中,如果对题意理解不清,对条件运用不当,往往会陷入题目所设的“陷阱”之中,出现似是而非的错误。举例剖析如下. In the solution of the problems related to quadratic equations, if the meaning of the questions is unclear and the conditions are not applied properly, they will often fall into the “trap” set by the questions, causing plausible errors. An example is analyzed as follows.