Mathematics
Senior High
これってなんで間違っていますか？
(4) (与式) =9x* - 4(x2一2ァy二 y9
=(3*9*-[2(*ータポ
=[3z?二2(*ーカ3x2ー2(メー功)
ー(3x2十2メー2ヵ(3z2ー2x十2
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