9x^4-9x^2+7=0

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Solution for 9x^4-9x^2+7=0 equation:


Simplifying
9x4 + -9x2 + 7 = 0

Reorder the terms:
7 + -9x2 + 9x4 = 0

Solving
7 + -9x2 + 9x4 = 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'.
0.7777777778 + -1x2 + x4 = 0

Move the constant term to the right:

Add '-0.7777777778' to each side of the equation.
0.7777777778 + -1x2 + -0.7777777778 + x4 = 0 + -0.7777777778

Reorder the terms:
0.7777777778 + -0.7777777778 + -1x2 + x4 = 0 + -0.7777777778

Combine like terms: 0.7777777778 + -0.7777777778 = 0.0000000000
0.0000000000 + -1x2 + x4 = 0 + -0.7777777778
-1x2 + x4 = 0 + -0.7777777778

Combine like terms: 0 + -0.7777777778 = -0.7777777778
-1x2 + x4 = -0.7777777778

The x term is -1x2.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x2 + 0.25 + x4 = -0.7777777778 + 0.25

Reorder the terms:
0.25 + -1x2 + x4 = -0.7777777778 + 0.25

Combine like terms: -0.7777777778 + 0.25 = -0.5277777778
0.25 + -1x2 + x4 = -0.5277777778

Factor a perfect square on the left side:
(x2 + -0.5)(x2 + -0.5) = -0.5277777778

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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