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6*x^4-(26*x^2)-(((6*x)/6)*x) = 0
6*x^4-26*x^2-x^2 = 0
6*x^4-27*x^2 = 0
t_1 = x^2
6*t_1^2-27*t_1^1 = 0
6*t_1^2-27*t_1 = 0
DELTA = (-27)^2-(0*4*6)
DELTA = 729
DELTA > 0
t_1 = (729^(1/2)+27)/(2*6) or t_1 = (27-729^(1/2))/(2*6)
t_1 = 9/2 or t_1 = 0
t_1 = 0
x^2+0 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
t_1 = 9/2
x^2-9/2 = 0
1*x^2 = 9/2 // : 1
x^2 = 9/2
x^2 = 9/2 // ^ 1/2
abs(x) = (9/2)^(1/2)
x = (9/2)^(1/2) or x = -(9/2)^(1/2)
x in { 0, (9/2)^(1/2), -(9/2)^(1/2) }
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