乘法公式应用逐行扫描
School Journal of Mathematics(2020)
Abstract
乘法公式是初中数学中非常重要的公式之一,其应用十分广泛.解题时,若能根据题目的特点灵活运用乘法公式,就能达到迅速解题的目的.
一连续运用乘法公式
例1计算:(a-1)(1+a)(1+a2)(-1-a4).
解:原式=-(a2-1)(a2+1)(a4+1)
=-(a4-1)(a4+1)
=-(a8-1)=1-a8.
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