配方法是初中数学中一种重要的恒等变形的方法,它的应用十分广泛.在学习了二次函数的一般式和顶点式后,需要将一般式通过配方的方法转化为顶点式,从而找到抛物线的顶点坐标、对称轴,在此基础上画出二次函数的图象,解决相关的问题.但同学们在用 Mathematic method is a kind of important equal deformation method in junior middle school mathematics, and its application is very extensive.After learning the general and vertex form of quadratic function, we need to transform the formula of formula from general formula to vertex formula Find the coordinates of the vertices of the parabola, the symmetry axis, on the basis of which to draw quadratic function of the image to solve the related problems, but students are using