Mathematics
Senior High
できれば手書きで教えてもらえると助かります。
⑶です。
式を展開せよ。
_ の"く+の"(の二どが
6@ー2(+2(⑦ー2g寺(の十26寺め
@十2y二8(2十4アー2xy一3x一6y填9)
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