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x in (-oo:+oo)
36*x^4+3*x^2+1/16 = 0
t_1 = x^2
36*t_1^2+3*t_1^1+1/16 = 0
36*t_1^2+3*t_1+1/16 = 0
DELTA = 3^2-(1/16*4*36)
DELTA = 0
t_1 = -3/(2*36)
t_1 = -1/24 or t_1 = -1/24
t_1 = -1/24
x^2+1/24 = 0
1*x^2 = -1/24 // : 1
x^2 = -1/24
t_1 = -1/24
x^2+1/24 = 0
1*x^2 = -1/24 // : 1
x^2 = -1/24
x belongs to the empty set
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