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将一个式子(包括有理式和超越式)或一个式子的某一部分通过恒等变形化为完全平方式或几个完全平方式的和,这种方法称之为配方法.“直接开平方法”告诉我们根据完全平方公式a2±2ab+b2=(a±b)2可以将一元二次方程化为形如(ax+b)2=c(c≥0)的形式后求解,这就自然而然地导出了另一种解一元二次方程的解法——“配方法”.它的理论依据是完全平方公式
A formula (including rational and transcendental) or a part of an equation through equal deformation into a complete flat or several complete flat and, this method is called the formula method. “Direct Kaiping Method ”tells us to solve the unary quadratic equation in the form of (ax + b) 2 = c (c≥0) according to the complete square formula a2 ± 2ab + b2 = (a ± b) It is natural to derive another solution to the solution of a quadratic equation - “formula method.” Its theoretical basis is the complete square formula