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x in (-oo:+oo)
x^2-((2/3)*x)-(26/9) = o // - o
x^2-o-((2/3)*x)-(26/9) = 0
x^2-o+(-2/3)*x-26/9 = 0
x^2-o-2/3*x-26/9 = 0
DELTA = (-2/3)^2-(1*4*(-o-26/9))
DELTA = 4*(o+26/9)+4/9
4*(o+26/9)+4/9 = 0
(4*9*(o+26/9))/9+4/9 = 0
4*9*(o+26/9)+4 = 0
36*o+108 = 0
(36*o+108)/9 = 0
(36*o+108)/9 = 0 // * 9
36*o+108 = 0
36*o+108 = 0 // - 108
36*o = -108 // : 36
o = -108/36
o = -3
DELTA = 0 <=> t_1 = -3
x = 2/3/(1*2) i o = -3
x = 1/3 i o = -3
( x = ((4*(o+26/9)+4/9)^(1/2)+2/3)/(1*2) or x = (2/3-(4*(o+26/9)+4/9)^(1/2))/(1*2) ) i o > -3
( x = ((4*(o+26/9)+4/9)^(1/2)+2/3)/2 or x = (2/3-(4*(o+26/9)+4/9)^(1/2))/2 ) i o > -3
o+3 > 0
o+3 > 0 // - 3
o > -3
x in { 1/3, ((4*(o+26/9)+4/9)^(1/2)+2/3)/2, (2/3-(4*(o+26/9)+4/9)^(1/2))/2 }
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