Mathematics
Senior High
Resolved
赤色で囲ってあるやつを分かる方、詳しく解説してくださいm(_ _)m！お願いします‼️
次の二次方程式を解きなさい。
(1) x²-7x-4=0
(3)
2x²-3x-1=0
(2) 5x²+9x+1=0
(4) x²-x-1=0
(2))
(4)
2x² +5x-3=0
3.x²-2x-1=0
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