x^4-0.4x^2+0.19=0

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Solution for x^4-0.4x^2+0.19=0 equation: 


Simplifying
x4 + -0.4x2 + 0.19 = 0

Reorder the terms:
0.19 + -0.4x2 + x4 = 0

Solving
0.19 + -0.4x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-0.19' to each side of the equation.
0.19 + -0.4x2 + -0.19 + x4 = 0 + -0.19

Reorder the terms:
0.19 + -0.19 + -0.4x2 + x4 = 0 + -0.19

Combine like terms: 0.19 + -0.19 = 0.00
0.00 + -0.4x2 + x4 = 0 + -0.19
-0.4x2 + x4 = 0 + -0.19

Combine like terms: 0 + -0.19 = -0.19
-0.4x2 + x4 = -0.19

The x term is -0.4x2.  Take half its coefficient (-0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
-0.4x2 + 0.04 + x4 = -0.19 + 0.04

Reorder the terms:
0.04 + -0.4x2 + x4 = -0.19 + 0.04

Combine like terms: -0.19 + 0.04 = -0.15
0.04 + -0.4x2 + x4 = -0.15

Factor a perfect square on the left side:
(x2 + -0.2)(x2 + -0.2) = -0.15

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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