-1/4x^4+2x^2-4=0

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Solution for -1/4x^4+2x^2-4=0 equation: 


x in (-oo:+oo)

(-1/4)*x^4+2*x^2-4 = 0

2*x^2-1/4*x^4-4 = 0

t_1 = x^2

2*t_1^1-1/4*t_1^2-4 = 0

2*t_1-1/4*t_1^2-4 = 0

DELTA = 2^2-(-4*(-1/4)*4)

DELTA = 0

t_1 = -2/(-1/4*2)

t_1 = 4 or t_1 = 4

t_1 = 4

x^2-4 = 0

1*x^2 = 4 // : 1

x^2 = 4

x^2 = 4 // ^ 1/2

abs(x) = 2

x = 2 or x = -2

t_1 = 4

x^2-4 = 0

1*x^2 = 4 // : 1

x^2 = 4

x^2 = 4 // ^ 1/2

abs(x) = 2

x = 2 or x = -2

x in { 2, -2, 2, -2 }

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