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(2/3)*x^2-(5*x)-6 = 0
(2/3)*x^2-5*x-6 = 0
2/3*x^2-5*x-6 = 0
DELTA = (-5)^2-(-6*2/3*4)
DELTA = 41
DELTA > 0
x = (41^(1/2)+5)/(2/3*2) or x = (5-41^(1/2))/(2/3*2)
x = 3/4*(41^(1/2)+5) or x = 3/4*(5-41^(1/2))
x in { 3/4*(5-41^(1/2)), 3/4*(41^(1/2)+5) }
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