9x^8-20x^4+144=0

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Solution for 9x^8-20x^4+144=0 equation:


Simplifying
9x8 + -20x4 + 144 = 0

Reorder the terms:
144 + -20x4 + 9x8 = 0

Solving
144 + -20x4 + 9x8 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
16 + -2.222222222x4 + x8 = 0

Move the constant term to the right:

Add '-16' to each side of the equation.
16 + -2.222222222x4 + -16 + x8 = 0 + -16

Reorder the terms:
16 + -16 + -2.222222222x4 + x8 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + -2.222222222x4 + x8 = 0 + -16
-2.222222222x4 + x8 = 0 + -16

Combine like terms: 0 + -16 = -16
-2.222222222x4 + x8 = -16

The x term is -2.222222222x4.  Take half its coefficient (-1.111111111).
Square it (1.234567901) and add it to both sides.

Add '1.234567901' to each side of the equation.
-2.222222222x4 + 1.234567901 + x8 = -16 + 1.234567901

Reorder the terms:
1.234567901 + -2.222222222x4 + x8 = -16 + 1.234567901

Combine like terms: -16 + 1.234567901 = -14.765432099
1.234567901 + -2.222222222x4 + x8 = -14.765432099

Factor a perfect square on the left side:
(x4 + -1.111111111)(x4 + -1.111111111) = -14.765432099

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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