配方法将问题看成某个变量的二次式,并将其配成一个完全平方与一个常量的代数和的形式,以达到发现和研究问题性质的方法.此方法在解二次函数的有关问题及化简曲线方程中经常用到.配方法是对数学式子进行一种定向变形(配成“完全平方”)的技巧,通过配方找到已知和未知的联系,从而化繁为简.何时配方,需要我们适当预测,并且合理运用“裂项”与“添项”、 The method considers the problem as a quadratic form of a variable and assigns it as an algebraic sum of a complete square and a constant in order to find and study the nature of the problem. Problems and simplify the curve equation often used with the method of mathematical formula is a kind of directional deformation (dubbed “completely squared ”) skills, through the formula to find the known and unknown, so as to simplify Jane. When the formula, we need to properly predict, and the rational use of “split” and “add items”,