单词completing-the-square
网络: 配方；配方法；完全平方
A new method of completing the square with reverse order is presented by change quadric form into standard form.
提出了一种新的将二次型化为标准型的配方法——逆序配方法。
solve an assigned quadratic equation by completing the square
用完成平方法解指定的一个二次方程