Mathematics
Senior High
解説お願いします!!
22 (1) (a+b+c)(a²+b²+c²-ab-bc-ca) t
(2) (1) の結果を用いて, (x+y-1)(x^-xy+y^+x+y+1) を展開せよ。
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![(2)[1]の式はなぜこうなるのでしょうか？
解説お願いします🙏🏻 - 1](https://d1e9oo257tadp1.cloudfront.net/uploads/qa_question_image/file/1810073/thumb_l_webp_1717B3E3-8A84-49A5-82D1-466207496D96.webp?Expires=1787367410&Signature=JmfGyAj35vEyG7VFd0caFKLawTGfnzPIZ4RMLNsAEpDGHyzvr1pJ01vEhy~NN6dZAanrTYkDuXuNyiGrHfut~QYkShTC1c5egWpOLa2M5QIg5nTIe17rakT-s4EmTWXqoXaEkSBHEEWTViBPfIlyH88HI4uQc4ebWHD09~Nk7VFDlTVoPxumDN7Alva2~1SDz1LHgNRMbWObKOJv9fP5ivMDYviKvv6N029JDHUXYi3HYChJo9dPm0GxmdvrQuSaf9gJ4CYGdvP80EyR6VOssrWL2Eei~z0FlJT~417Gr7GTz~r4TkpEMwh34owSjRawPX0q14-r9vulfC2M1LIEhQ__&Key-Pair-Id=K2W722D70GJS8W&Expires=1787367410&Signature=PUVE7ETLFghJ4iYzTS00sLWH5CEcFeP3EYigzJGKk-D9b38obIrgwCpi7V9x8TtXDq70OHXxpzv2XZdCjaucWuAyg1br8Y~Pm-cUUsIJ3QMbDEo4PeQeSFTaTOo6q0DyD5cL8hEZZ4SGsSZikTg3I8ILiBQ5ZzjI5vklGn8vf3Powvq5nOcR6DsUHSKVW8pepkzW66Sso4kDKUbdgn0f5SfitsFS0qpC4imtKeubrP~Ul2BlUNdeNqNYRgx2sVsH7FukJl1PpkJt5qC-T0dl739WsieozYU8yedRKVXID8x0i4~3guFGheLmzP0akgfORauZK2wH8mVAwz8atnXd7A__&Key-Pair-Id=K2W722D70GJS8W)
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