Mathematics
Senior High
Solved
(2)1段目から2段目の式どうやって変形してるんですか…?
【例題2】 (1) (x-1)x+1)x+1)=(
~
(x^2-1)(x^²-x+1)(x²+x+1)=(x+1)(x-1)(x^2-x+1)(x^2+x+1)
=(x-1)(x+1)
=
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なるほど。ありがとうございます。助かりました!