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4*x^2+(6/2)*x^2-(10*x)+x-3 = 0
4*x^2+(6/2)*x^2-10*x+x-3 = 0
7*x^2-9*x-3 = 0
DELTA = (-9)^2-(-3*4*7)
DELTA = 165
DELTA > 0
x = (165^(1/2)+9)/(2*7) or x = (9-165^(1/2))/(2*7)
x = (165^(1/2)+9)/14 or x = (9-165^(1/2))/14
x in { (9-165^(1/2))/14, (165^(1/2)+9)/14 }
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