8x^4+7x^2+5=0

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Solution for 8x^4+7x^2+5=0 equation:


Simplifying
8x4 + 7x2 + 5 = 0

Reorder the terms:
5 + 7x2 + 8x4 = 0

Solving
5 + 7x2 + 8x4 = 0

Solving for variable 'x'.

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

Divide each side by '8'.
0.625 + 0.875x2 + x4 = 0

Move the constant term to the right:

Add '-0.625' to each side of the equation.
0.625 + 0.875x2 + -0.625 + x4 = 0 + -0.625

Reorder the terms:
0.625 + -0.625 + 0.875x2 + x4 = 0 + -0.625

Combine like terms: 0.625 + -0.625 = 0.000
0.000 + 0.875x2 + x4 = 0 + -0.625
0.875x2 + x4 = 0 + -0.625

Combine like terms: 0 + -0.625 = -0.625
0.875x2 + x4 = -0.625

The x term is 0.875x2.  Take half its coefficient (0.4375).
Square it (0.19140625) and add it to both sides.

Add '0.19140625' to each side of the equation.
0.875x2 + 0.19140625 + x4 = -0.625 + 0.19140625

Reorder the terms:
0.19140625 + 0.875x2 + x4 = -0.625 + 0.19140625

Combine like terms: -0.625 + 0.19140625 = -0.43359375
0.19140625 + 0.875x2 + x4 = -0.43359375

Factor a perfect square on the left side:
(x2 + 0.4375)(x2 + 0.4375) = -0.43359375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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