2019年春七年级数学下册第3章整式的乘除3.4第2课时完全平方公式课件新版浙教版20190119271.pptx

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第3章 整式的乘除,第2课时 完全平方公式,学知识,筑方法,勤反思,知识点 完全平方公式,3.4 乘法公式,学知识,D,3.4 乘法公式,解析 应用完全平方公式计算,关键要分清公式中的a,b分别代表什么,3.4 乘法公式,3.4 乘法公式,类型一 熟练掌握完全平方公式,筑方法,3.4 乘法公式,A,3.4 乘法公式,3.4 乘法公式,类型二 应用完全平方公式求代数式的值,解析 完全平方公式揭示了ab,a2b2,ab之间的关系,利用三者之间的关系,即可解决本题,3.4 乘法公式,3.4 乘法公式,3.4 乘法公式,类型三 利用完全平方公式解决实际问题,3.4 乘法公式,3.4 乘法公式,小结,勤反思,(ab)2 _,平方差公式,化简,计算,a22abb2,应用,3.4 乘法公式,(a-b)2 _,a2-2abb2,反思,3.4 乘法公式,

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