Mathematics
Senior High
2行目から3行目がどうやって、展開できるのか
わかりません!教えてください!
(3) (αーb)°(α'+ab+6°)?
={(a-b)(a°+ab+6°)}?
=(α°-b)?
=(α^)?-2α°b°+(6°)?
=a°-2α°b+が
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そしたらabは、どこに行ったんですか?