对很多人来说，二次方程是很恐怖的。
The quadratic equation may have instilled horror in many of us.
这个函数求解一个标准的二次方程。
得到两个解，这是二次方程。
然后他们才会高兴地摆脱长除法和二次方程的练习。
Then they can happily abandon the drill in long division and quadratic equations.
该方法优点是计算简单，只需要解一些二次方程组。
The method is simple for computation, and it only needs to solve some equations.
该方法优点是计算简单，只需要解一些二次方程组。
The method is simple for computation, and it only needs to solve some equations.
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