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解析几何的实质是通过建立坐标系,用代数方法研究几何问题.为避免代数方法带来的复杂计算,在解决直线与圆锥曲线的位置关系这类解析几何问题时,通常采用“设而不解”的方法,利用根与系数的关
The essence of analytic geometry is to study the geometric problem by using the algebraic method by establishing the coordinate system.In order to avoid the complicated calculation brought by the algebraic method, it is usually used to solve the analytical geometry problem such as the positional relationship between the straight line and the conic curve Solution "method, the use of the root and the coefficient of closure