3x²-6x-7=0
D¹=9+3*7=9+21=30
x=3±√30/3
x1=1+(√30 / 3)
x2=1-(√30 / 3)
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3x²-6x-7=0
D¹=9+3*7=9+21=30
x=3±√30/3
x1=1+(√30 / 3)
x2=1-(√30 / 3)