二次不等式
Quadratic inequality An inequality of the form $ax^2 + bx + c > 0$ (or $\geq, <, \leq$), whose solution set is often determined by the discriminant and roots.
CSCA 数学 考试术语
Quadratic inequality An inequality of the form $ax^2 + bx + c > 0$ (or $\geq, <, \leq$), whose solution set is often determined by the discriminant and roots.
CSCA 数学 考试术语