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[/kwɔˏdrætɪk ɪˈkweɪʒn; kwɑdˋrætɪkɪˋkweʒən/] (algebra 代数) equation that uses the square (and no higher power) of an unknown quantity, egx2 + 2x 用法:
8 = 0 二次方程式（如x2 + 2x 用法:
8 = 0）. quadratic equation 2
[/kwɔˏdrætɪk ɪˈkweɪʒn; kwɑdˋrætɪkɪˋkweʒən/] (algebra 代数) equation that uses the square (and no higher power) of an unknown quantity, eg x^2 + 2x - 8 = 0 二次方程式（如 x^2 + 2x - 8 = 0）. |