短語詞組短語quadratic curve equation 二次曲線方程Quadratic parameterized equation 二次參數(shù)方程組quadratic matrix equation 二次矩陣方程quadratic indefinite equation 二次不定方程binary quadratic diophantine equation 二元二次Diophantine方程quadratic differential equation 二次微分方程quadratic indeterminate equation 二次不定方程quadratic integral equation 二次積分方程quadratic c equation 二次方程 返回 quadratic equation