x²-6-18x=0
x²-18x-6=0
D1=k²-ac = (-9)²-1*(-3) = 81+6=87
x= (-k±√D)/a = (9±√78)/1= 9±√87
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x²-6-18x=0
x²-18x-6=0
D1=k²-ac = (-9)²-1*(-3) = 81+6=87
x= (-k±√D)/a = (9±√78)/1= 9±√87