Mathematics
Senior High
Resolved
数学Iの式の展開の問題です。
赤い文字式から青い線の式にまとめれるのはなぜですか？
教えてください！
(3) (a+1)²(a²-a+1)² = {(a+1)(a²-a+1)}²
=(a³+1)²
= (a³)²+2·a³+1
=a6+2a³+1
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