The acquisition of the power of solving a quadratic equation is part of the process of sharpening the mind. 学习解二次方程就是塑造头脑这个工具的一部分。
This procedure is used to calculate a quadratic equation of one dollar cottage roots, very useful, and they hope to help you. 这个程序是用来计算一个一元二次方程的平房根的，非常有用，希望对你有帮助。
