Comment
Log in to commentRecommended
Senior High
Mathematics
テスト質問
Senior High
Mathematics
テスト
Senior High
Mathematics
てすと
Senior High
Mathematics
test badge notification
Senior High
Mathematics
test notification
Senior High
Mathematics
test notification
Senior High
Mathematics
QA push test
Senior High
Mathematics
QA TEST No.2
Senior High
Mathematics
QA TEST
Senior High
Mathematics

分母が同じなので、分子を2x^2-(x+1)と計算すれば大丈夫です