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多项式与多项式相乘是乘法中的难点.如何运用转化思想化难为易呢?笔者经过多年的教学实践体会到,借用小学多位数乘多位数的方法来进行多项式的乘法,可以起到事半功倍的效果.本文以人教版八年级数学上册的一道题为例,作简要说明.计算:(1)(3x+1)(x+2);(2)(x-8y)(x-y);(3)(x+y)(x~2-xy+y~2).分析用堆式计算如下:
Polynomial and polynomial multiplication is the difficulty of multiplication .How to use the transformation of ideology is difficult for the author? After years of teaching practice I realized that the use of multi-digit multiples of primary schools to carry out polynomial multiplication, you can do more with less The effect of this article in the eighth edition of the PEP mathematics book on the issue of a title for a brief explanation.Calculation: (1) (3x +1) (x +2); (2) (x-8y) (xy); (3) (x + y) (x ~ 2-xy + y ~ 2) Analytical heap calculation is as follows: