y^4-y^2+9=0

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


Simplifying
y4 + -1y2 + 9 = 0

Reorder the terms:
9 + -1y2 + y4 = 0

Solving
9 + -1y2 + y4 = 0

Solving for variable 'y'.

Begin completing the square.

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + -1y2 + -9 + y4 = 0 + -9

Reorder the terms:
9 + -9 + -1y2 + y4 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -1y2 + y4 = 0 + -9
-1y2 + y4 = 0 + -9

Combine like terms: 0 + -9 = -9
-1y2 + y4 = -9

The y term is -1y2.  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.
-1y2 + 0.25 + y4 = -9 + 0.25

Reorder the terms:
0.25 + -1y2 + y4 = -9 + 0.25

Combine like terms: -9 + 0.25 = -8.75
0.25 + -1y2 + y4 = -8.75

Factor a perfect square on the left side:
(y2 + -0.5)(y2 + -0.5) = -8.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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