...uld let student arrange the weekend time, should not excessively many interferences 一元二次方程 » A quadratic equation 那首歌听起来很动 » The song sounds very interactive ..
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You will get two solutions; it's a quadratic equation.
得到两个解，这是二次方程。
It is a quadratic equation, so you get two solutions of which one of them is nonphysical, so you can reject that one.
这是一个两次方程，你会得到两个，和物理无关的答案，你可以舍掉那一个。
In this paper, the cubic equation is simplified into a quadratic equation, thus greatly simplifying the calculation.
本文将三次方程简化为二次方程，使计算得到很大简化。
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