25y^4+y^2-0.9216=0

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Solution for 25y^4+y^2-0.9216=0 equation:


Simplifying
25y4 + y2 + -0.9216 = 0

Reorder the terms:
-0.9216 + y2 + 25y4 = 0

Solving
-0.9216 + y2 + 25y4 = 0

Solving for variable 'y'.

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

Divide each side by '25'.
-0.036864 + 0.04y2 + y4 = 0

Move the constant term to the right:

Add '0.036864' to each side of the equation.
-0.036864 + 0.04y2 + 0.036864 + y4 = 0 + 0.036864

Reorder the terms:
-0.036864 + 0.036864 + 0.04y2 + y4 = 0 + 0.036864

Combine like terms: -0.036864 + 0.036864 = 0.000000
0.000000 + 0.04y2 + y4 = 0 + 0.036864
0.04y2 + y4 = 0 + 0.036864

Combine like terms: 0 + 0.036864 = 0.036864
0.04y2 + y4 = 0.036864

The y term is y2.  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.
0.04y2 + 0.25 + y4 = 0.036864 + 0.25

Reorder the terms:
0.25 + 0.04y2 + y4 = 0.036864 + 0.25

Combine like terms: 0.036864 + 0.25 = 0.286864
0.25 + 0.04y2 + y4 = 0.286864

Factor a perfect square on the left side:
(y2 + 0.5)(y2 + 0.5) = 0.286864

Calculate the square root of the right side: 0.535596863

Break this problem into two subproblems by setting 
(y2 + 0.5) equal to 0.535596863 and -0.535596863.

Subproblem 1

y2 + 0.5 = 0.535596863 Simplifying y2 + 0.5 = 0.535596863 Reorder the terms: 0.5 + y2 = 0.535596863 Solving 0.5 + y2 = 0.535596863 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y2 = 0.535596863 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y2 = 0.535596863 + -0.5 y2 = 0.535596863 + -0.5 Combine like terms: 0.535596863 + -0.5 = 0.035596863 y2 = 0.035596863 Simplifying y2 = 0.035596863 Take the square root of each side: y = {-0.188671309, 0.188671309}

Subproblem 2

y2 + 0.5 = -0.535596863 Simplifying y2 + 0.5 = -0.535596863 Reorder the terms: 0.5 + y2 = -0.535596863 Solving 0.5 + y2 = -0.535596863 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + y2 = -0.535596863 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + y2 = -0.535596863 + -0.5 y2 = -0.535596863 + -0.5 Combine like terms: -0.535596863 + -0.5 = -1.035596863 y2 = -1.035596863 Simplifying y2 = -1.035596863 Reorder the terms: 1.035596863 + y2 = -1.035596863 + 1.035596863 Combine like terms: -1.035596863 + 1.035596863 = 0.000000000 1.035596863 + y2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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