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一、整式相乘注意事项:1.在运用单项式乘法时,应先将单项式分成三类:即系数、相同字母、不相同字母,然后再运用单项式乘以单项式的法则。2.单项式乘以多项式其实质是转化为单项式乘以单项式,转化的依据是分配律,在转化的过程中,要防止漏项未乘。3.多项式乘法是整式乘法的重点内容,也是前几节各种性质、法则的一个综合运用,在做多项式乘法时,要先将其中某个多项式看作一个整体(单项式),后又将它看作一个多项式,这是一种重要的数学思想,要学会运用。
First, the integral multiplication Note: 1. In the use of monomial multiplication, the monads should be divided into three categories: the coefficient, the same letter, different letters, and then use the monomial multiplied by the law of monomials. 2. Monomials multiplied by polynomials Its essence is converted to monomial by monomial, conversion is based on the distribution law, in the process of conversion, to prevent the omission of missed items. 3. Polynomial multiplication is the key content of integer multiplication, but also a comprehensive application of various nature and law of the previous sections. When doing polynomial multiplication, one of the polynomials should be considered as a whole (monomial) As a polynomial, this is an important mathematical thought, to learn to use.