2x^4-17x^2+72=0

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Solution for 2x^4-17x^2+72=0 equation:


Simplifying
2x4 + -17x2 + 72 = 0

Reorder the terms:
72 + -17x2 + 2x4 = 0

Solving
72 + -17x2 + 2x4 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
36 + -8.5x2 + x4 = 0

Move the constant term to the right:

Add '-36' to each side of the equation.
36 + -8.5x2 + -36 + x4 = 0 + -36

Reorder the terms:
36 + -36 + -8.5x2 + x4 = 0 + -36

Combine like terms: 36 + -36 = 0
0 + -8.5x2 + x4 = 0 + -36
-8.5x2 + x4 = 0 + -36

Combine like terms: 0 + -36 = -36
-8.5x2 + x4 = -36

The x term is -8.5x2.  Take half its coefficient (-4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
-8.5x2 + 18.0625 + x4 = -36 + 18.0625

Reorder the terms:
18.0625 + -8.5x2 + x4 = -36 + 18.0625

Combine like terms: -36 + 18.0625 = -17.9375
18.0625 + -8.5x2 + x4 = -17.9375

Factor a perfect square on the left side:
(x2 + -4.25)(x2 + -4.25) = -17.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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