この不定詞方程式の解き方を教えてください！！
間違ってたらすみません
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![(3)の問題がわかりません。
[1]では判別式を使っているのに[2][3]では使ってません... - 1](https://d1e9oo257tadp1.cloudfront.net/uploads/qa_question_image/file/1751417/thumb_l_webp_8072EAD7-8653-48B6-8ADE-62CAA9EEB0DF.webp?Expires=1747829746&Signature=mCJvFjAdv2mzaqtd3XHBTvnI9kHQCK-kiU7KtQwZxY3eYhl8VywZ61u4XBG~on34LFjrFngml~4n-Pzn8iZARjpmGyde~tG2hqRiJ0W68-ngNLrXiynP0ckkKMUrVSn7nKt1N2jn9ESqFQ4B8HRhyDM7vRf2s5bKWS6cSo6GP32idEPdawB3qx80MknThiDgk~ADaMTsoUraC-kor-yVLk2IfPYXs94hHDrC2b9jAfSwCIDYDVZL0zMZI1OzptHWviyg-LDT~6kehMQpsq18A7fzrN4RF2LyE8KEGv07W2Rhk5aJm6YtyJbmH90TprF67FdT1AydY71fLljrxcfNkw__&Key-Pair-Id=K2W722D70GJS8W&Expires=1747829746&Signature=rCHwJefHL-Vzz9v~uTo5eHpj-ZfdKdpLKa-c64bLzuPhJFWjNKYklg7kK3MpiqdlLWtD3NQKhAUCFyweurToRJGR93NGyFD5Yvr~DuxbG0IRJG1TlNn5py2hGQRa5cxDVLAWa~sF5wZ7AXQT-sKMOBTor1fPIIO9MDHNpbgfUG9f6Yr5lc6GTCWOBh80cn-x6pRK7t0PGyai5FUDVpjFRsDjFaUdFSwXkDfj-T-Vq-evP79d942b-kb4nFsg7~wqU56n~1XAJRxq9G1kQZw5DbCWu5thDj9vtQ79c49osJMYnOGsZf8ZEoxVg0X1KLnT3gBDZZtlS-f~V4xZGt5C9g__&Key-Pair-Id=K2W722D70GJS8W)
![(3)の問題がわかりません。
[1]では判別式を使っているのに[2][3]では使ってません... - 2](https://d1e9oo257tadp1.cloudfront.net/uploads/qa_question_image/file/1751418/thumb_l_webp_C0068A8B-C09A-47C4-BA21-F568E5071D77.webp?Expires=1747829746&Signature=qHz32qV1sPts2MoiQz3GBl8oFPtZ5GCX5sOAzJszrSn1VRJ5KvlY9mh0Y46Roi6PAeWFOcnrzIIPn~Xm9SrfAAjwOyE86kPVtJvRmeDfOZpLZi0Z7q5z7ENPMH560OGg56CMouhpouLI7-BbuEwLneLAn5BdpVNENharcQ4xP2Jp2vjqurmUt1RV8PxMb1Qshtu3mS9QEKR6pNE2wxsRSndE4RVHFduj4JTh2RRjTYxkwQ-HApwOFYpND9IGzrHu035qjC-Y8aZBSVHThLOLZHC4yRnevVmM6at52v1fAS-XVJv8O-DnxKKG7DH3ADjgbHndp3jxdInSPnwmtaExRw__&Key-Pair-Id=K2W722D70GJS8W&Expires=1747829746&Signature=QujHutRB9nUBWPrKbJRLAlE1HXk1fel-d-xnHGL7deL138DKPxhlIIssAokeKqxu8s-cFGTfrYYyjKPZvONgzPyJO2ZR8uTWeog7lPeLMU-0REKYbcaRUXpktCGqhYgtS6IqhBaa0GmmeiGHe7bqa5SJS~MZtLhOksdJeZdVt3e-c-21MY9trFpRaCiQ7ZeurlxnxImDpkDgRjMUSALtlcMwEm7SYeGDdecWEPP0aw7ujVYhgl08dTahDpXHV~dx39HjtJrb6bs061n3ZWVfRVJXHw39xvumE-0X~efE~VZFmZp5kYC0SzO~1e0wfXlIHuaNf0j3By~YHz0fPu0nlQ__&Key-Pair-Id=K2W722D70GJS8W)
