quadratic equation
noun [ C ] uk/kwɒdˌræt.ɪk ɪˈkweɪ.ʒən/ us/kwɑːdˌræt̬.ɪk ɪˈkweɪ.ʒən/
二次方程式
an equation that includes an unknown value that is multiplied by itself only once, and does not include an unknown value multiplied by itself more than once
In the quadratic equation, 2y2+3y=14, y=2 or y=-3½. 在二次方程式2y2+3y=14中，y=2或y=-3½。