3x^4-40x^2+240=0

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Solution for 3x^4-40x^2+240=0 equation:


Simplifying
3x4 + -40x2 + 240 = 0

Reorder the terms:
240 + -40x2 + 3x4 = 0

Solving
240 + -40x2 + 3x4 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
3 the coefficient of the squared term: 

Divide each side by '3'.
80 + -13.33333333x2 + x4 = 0

Move the constant term to the right:

Add '-80' to each side of the equation.
80 + -13.33333333x2 + -80 + x4 = 0 + -80

Reorder the terms:
80 + -80 + -13.33333333x2 + x4 = 0 + -80

Combine like terms: 80 + -80 = 0
0 + -13.33333333x2 + x4 = 0 + -80
-13.33333333x2 + x4 = 0 + -80

Combine like terms: 0 + -80 = -80
-13.33333333x2 + x4 = -80

The x term is -13.33333333x2.  Take half its coefficient (-6.666666665).
Square it (44.44444442) and add it to both sides.

Add '44.44444442' to each side of the equation.
-13.33333333x2 + 44.44444442 + x4 = -80 + 44.44444442

Reorder the terms:
44.44444442 + -13.33333333x2 + x4 = -80 + 44.44444442

Combine like terms: -80 + 44.44444442 = -35.55555558
44.44444442 + -13.33333333x2 + x4 = -35.55555558

Factor a perfect square on the left side:
(x2 + -6.666666665)(x2 + -6.666666665) = -35.55555558

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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