完全平方公式作为初中代数中一个重要的恒等式,它既是进行代数运算与变形的知识基础,也是进行因式分解的重要工具.这个知识是学生在已经掌握了单项式乘法、多项式乘法及平方差公式基础上的进一步拓展,对学习因式分解、解一元二次方程、配方法、勾股定理以及图形面积的计算等内容都有举足轻 As an important identity of junior high school algebra, perfect square formula is not only the knowledge basis for algebraic operation and deformation, but also the important tool for factorization.This knowledge is that students have already mastered the basis of monomial multiplication, polynomial multiplication and square deviation formula On the further expansion of the learning factorization, solving a quadratic equation, with the method, the Pythagorean theorem and calculation of graphics area and so has ample content