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一元二次不等式的解集与一元二次方程的根之间有下列一个性质:①一元二次不等式解集端点值(定数)是对应一元二次方程的两根;推广性质;②任何一个最终可化为一元一次或一元二次的不
There is one property between the solution set of a quadratic inequality and the root of a one-dimensional quadratic equation: 1 Unary quadratic inequality solution set Endpoint (fixed number) is two roots corresponding to a quadratic equation; Generalization property; 2 Any one final Can be turned into one dollar or one dollar twice