5x^4=3x^2-8

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Solution for 5x^4=3x^2-8 equation:


Simplifying
5x4 = 3x2 + -8

Reorder the terms:
5x4 = -8 + 3x2

Solving
5x4 = -8 + 3x2

Solving for variable 'x'.

Reorder the terms:
8 + -3x2 + 5x4 = -8 + 3x2 + 8 + -3x2

Reorder the terms:
8 + -3x2 + 5x4 = -8 + 8 + 3x2 + -3x2

Combine like terms: -8 + 8 = 0
8 + -3x2 + 5x4 = 0 + 3x2 + -3x2
8 + -3x2 + 5x4 = 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
8 + -3x2 + 5x4 = 0

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

Divide each side by '5'.
1.6 + -0.6x2 + x4 = 0

Move the constant term to the right:

Add '-1.6' to each side of the equation.
1.6 + -0.6x2 + -1.6 + x4 = 0 + -1.6

Reorder the terms:
1.6 + -1.6 + -0.6x2 + x4 = 0 + -1.6

Combine like terms: 1.6 + -1.6 = 0.0
0.0 + -0.6x2 + x4 = 0 + -1.6
-0.6x2 + x4 = 0 + -1.6

Combine like terms: 0 + -1.6 = -1.6
-0.6x2 + x4 = -1.6

The x term is -0.6x2.  Take half its coefficient (-0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
-0.6x2 + 0.09 + x4 = -1.6 + 0.09

Reorder the terms:
0.09 + -0.6x2 + x4 = -1.6 + 0.09

Combine like terms: -1.6 + 0.09 = -1.51
0.09 + -0.6x2 + x4 = -1.51

Factor a perfect square on the left side:
(x2 + -0.3)(x2 + -0.3) = -1.51

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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