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。
A new method of completing the square with reverse order is presented by change quadric form into standard form.
通过建立二次型与对称双线性函数之间的对应关系，在双线性函数的概念下讨论二次型化标准型的问题，最后给出惯性定理的一个证明。
In this paper, we use the theory of symmetric bilinear function to solve problems of quadratic form, and finally give a proof of the inertia theorem.
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