Mathematics
Senior High
1番上の式から2番目の式って何してるんですか？
掛けて、
a²(b²+c²-a²) + b²(c²+ a²-b²)=c²(a²+b²-c²)
a-2a²b²+b4-c²=0
(a²-6²)²-(c²)²=0
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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=1787290635&Signature=Bo9mIXPQxiuoTwCoggG~EFSxmxkl7tJ5x5BHUkbdAvQ8TZoKRpI2S0mW0kn6~xYQqJBIvcn5zO4qNIICeT5MYJ03xGyai5M~9KE2iCOHgJvsehO8um-IwU8g9PrcSrH763t2ZOD55S3WgygjfTK5trDivTRZrt285LNEtL4ev23LGdN8utVPm6EQzgqZSHMHkb7PLXhpviQTt7aKpqqEn-FSnFJ2nDrJ7pATTtq2-rpDn9IgWXzV5vMb17nJ0fQwqADz1EHPrHbbEi-HtRIuVHkgBTRe08~kxf7l3aDr22cMCkEiV2TJOygZnkOpfeDiU7Fv3yYLAZ4VxHgI1OsLCw__&Key-Pair-Id=K2W722D70GJS8W&Expires=1787290635&Signature=mnf3aYUCzuUjn~MhZ56GpwOY4S6wmCcrgVhZP11fR9W9QLa5BARiU9xBHrViITL7QEtmxuh5zraqZD2kC812aFHheD0t-LNf7u-Z0lTp4LsHuX3fEZc~iTJlbvaUh00UmEdaWKzgqIvnGykX-7zGOrnN4qeUg3YvoU6h0wSqoFdJM~y7X77GuU2f0yKtPxBWX3qEOLYGN7K4Svub6EMvKcUefbbHPqO6kQwLzG37gsLiN8uZ6E-aSXyWeErCKvF6qEAbWhFWEAdwycG9cfuUe~5bw5eIFX6hEGITdgKVGrrho7cMqweeO12l4cfoLN6aeOwqQOp5mHwDU94IbkdAuQ__&Key-Pair-Id=K2W722D70GJS8W)
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それのやり方がわからないのですが💦