在讨论根的时候,往往涉及到一元二次方程根与判别式的关系,正是这种关系给我们解方程或讨论方程(一元二次方程函数、一元二次方程、一元二次不等式)带来极大的帮助,同时部分同学也有了框框,形成一个定势,把“Δ”的使用仅仅局限在较窄的范围,即学生在解题过程中怎样合理有效地使用Δ存在盲点.实 When discussing the root, it often involves the relationship between the root of a quadratic equation and the discriminant. It is this relationship that gives us the solution to the equation or the discussion of equations (unary quadratic function, unary quadratic equation, unary quadratic inequality). With great help, at the same time some students also have a frame to form a fixed potential. The use of “Δ” is only limited to a narrow range, that is, students use Δ in the process of solving problems to have a blind spot. real