Mathematics
Senior High

解き方が分からないので教えて下さい。
よろしくお願いします!

賠罰 次の2次方程式の解を判別しなさい。 各 ーー6ァ一3=テ0 (2) 2xXー5x+エ7=テ0 3) 4ゲー12x填9テ0

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