Mathematics
Senior High
この2問の解き方を教えて頂けませんか？(´；ω；｀)
2
(4) 4x²+4x+1-y²
= (2x+y +1)(2x-Y+1)
(6) (x+y+9)²-81
-) = (x + y +18) (x+y)
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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=1787304104&Signature=UNd6B~wPaMCfk2nRRatXvUee~S6rq~hOTnEMNQBQB3b7jul9ZP5rOn1YF97C~iiLlkCCIGYBtkNPnfiJ0tMjIGyQfbjbD6DQbV~pM2QdEdD-K-zct6D8OCmgqNChnWYF8ur~KofF7D65z-YAZ68XD~4dFUJLPMZ-TzIZqxSMpm18gOpCPJlYtZZM0PqldDJE5cAPYw7FJIzD4qc5NOioJ6KC6zvIse1KVMms4MiPV3UX8hop2rAq5TmvbAI7oIbCag0Ygc8k2rJIHVxJ4HBvmT15C190ZRYZX49hY74SA0Pv5kd65ZsXt1lpeO-aekVOaZD9ETSyq6iyqDRU9xpc0Q__&Key-Pair-Id=K2W722D70GJS8W&Expires=1787304104&Signature=catx8xgZCef77DbSOO~uUTdQa8A7bYMlZVuJgq9NJzztReSEZHRIF~GQdlD2iHdlhYuDb5eDzF1eDpSfHVfEZCcAuOnTEoTy9YryBC7YwitqDcvBZBX5hF0mQtX2MwvgEP-9qae5dwczdyJi3tPzHr2iQHiHbpjErMEdWHm9ORh8oy8~mKxUhrDOQ35YyGNiBDE6h2dINj0iiMknryKou1a~6Q1~RU6BJQCAqyq5SIfLmlqc8T6L6W7BlCn3OOZGDD6nOIzC-J5TMamWCKfj0zzSkIi0gGclujGKMa3zyZSWfZwbxCoXCIN467ujkKW7I0lM42fM8uSWAjyROTYeOQ__&Key-Pair-Id=K2W722D70GJS8W)
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