x^4+4x^2+8=0

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Solution for x^4+4x^2+8=0 equation:


Simplifying
x4 + 4x2 + 8 = 0

Reorder the terms:
8 + 4x2 + x4 = 0

Solving
8 + 4x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-8' to each side of the equation.
8 + 4x2 + -8 + x4 = 0 + -8

Reorder the terms:
8 + -8 + 4x2 + x4 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + 4x2 + x4 = 0 + -8
4x2 + x4 = 0 + -8

Combine like terms: 0 + -8 = -8
4x2 + x4 = -8

The x term is 4x2.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x2 + 4 + x4 = -8 + 4

Reorder the terms:
4 + 4x2 + x4 = -8 + 4

Combine like terms: -8 + 4 = -4
4 + 4x2 + x4 = -4

Factor a perfect square on the left side:
(x2 + 2)(x2 + 2) = -4

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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