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在解析几何里利用坐标轴的旋转和平移来化简二次曲线方程是一种基本的方法.下面我们来介绍一种化简二次曲线方程的方法,这种方法十分简便.只根据四条简单的引理就能解决问题,我们先介绍这四条引理.
Simplifying the quadratic curve equation using the rotation and translation of the coordinate axes in analytical geometry is a basic method. Here we introduce a method to simplify the quadratic curve equation. This method is very simple. It is based on only four simple Lemma can solve the problem. Let’s introduce these four lemmas first.