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x in (-oo:+oo)
6*x^2-((2/9)*x^3)+3*x-(20*x)+3 = 0
(-2/9)*x^3+6*x^2+3*x-20*x+3 = 0
(-2/9)*x^3+6*x^2-17*x+3 = 0
(-2/9)*x^3+6*x^2-17*x+3 = 0 // * 0
{ 1, -1, 3, -3, 9, -9, 27, -27 }
1
x = 1
54*x^2-2*x^3-153*x+27 = -74
1
-1
x = -1
54*x^2-2*x^3-153*x+27 = 236
-1
3
x = 3
54*x^2-2*x^3-153*x+27 = 0
3
x-3
48*x-2*x^2-9
54*x^2-2*x^3-153*x+27
x-3
2*x^3-6*x^2
48*x^2-153*x+27
144*x-48*x^2
27-9*x
9*x-27
0
48*x-2*x^2-9 = 0
DELTA = 48^2-(-9*(-2)*4)
DELTA = 2232
DELTA > 0
x = (2232^(1/2)-48)/(-2*2) or x = (-2232^(1/2)-48)/(-2*2)
x = (6*62^(1/2)-48)/(-4) or x = (-6*62^(1/2)-48)/(-4)
x in { (6*62^(1/2)-48)/(-4), (-6*62^(1/2)-48)/(-4), 3}
x in { (6*62^(1/2)-48)/(-4), (-6*62^(1/2)-48)/(-4), 3 }
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