.25y^4+29y^2-9=0

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Solution for .25y^4+29y^2-9=0 equation:


Simplifying
0.25y4 + 29y2 + -9 = 0

Reorder the terms:
-9 + 29y2 + 0.25y4 = 0

Solving
-9 + 29y2 + 0.25y4 = 0

Solving for variable 'y'.

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

Divide each side by '0.25'.
-36 + 116y2 + y4 = 0

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + 116y2 + 36 + y4 = 0 + 36

Reorder the terms:
-36 + 36 + 116y2 + y4 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + 116y2 + y4 = 0 + 36
116y2 + y4 = 0 + 36

Combine like terms: 0 + 36 = 36
116y2 + y4 = 36

The y term is 116y2.  Take half its coefficient (58).
Square it (3364) and add it to both sides.

Add '3364' to each side of the equation.
116y2 + 3364 + y4 = 36 + 3364

Reorder the terms:
3364 + 116y2 + y4 = 36 + 3364

Combine like terms: 36 + 3364 = 3400
3364 + 116y2 + y4 = 3400

Factor a perfect square on the left side:
(y2 + 58)(y2 + 58) = 3400

Calculate the square root of the right side: 58.309518948

Break this problem into two subproblems by setting 
(y2 + 58) equal to 58.309518948 and -58.309518948.

Subproblem 1

y2 + 58 = 58.309518948 Simplifying y2 + 58 = 58.309518948 Reorder the terms: 58 + y2 = 58.309518948 Solving 58 + y2 = 58.309518948 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-58' to each side of the equation. 58 + -58 + y2 = 58.309518948 + -58 Combine like terms: 58 + -58 = 0 0 + y2 = 58.309518948 + -58 y2 = 58.309518948 + -58 Combine like terms: 58.309518948 + -58 = 0.309518948 y2 = 0.309518948 Simplifying y2 = 0.309518948 Take the square root of each side: y = {-0.556344271, 0.556344271}

Subproblem 2

y2 + 58 = -58.309518948 Simplifying y2 + 58 = -58.309518948 Reorder the terms: 58 + y2 = -58.309518948 Solving 58 + y2 = -58.309518948 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-58' to each side of the equation. 58 + -58 + y2 = -58.309518948 + -58 Combine like terms: 58 + -58 = 0 0 + y2 = -58.309518948 + -58 y2 = -58.309518948 + -58 Combine like terms: -58.309518948 + -58 = -116.309518948 y2 = -116.309518948 Simplifying y2 = -116.309518948 Reorder the terms: 116.309518948 + y2 = -116.309518948 + 116.309518948 Combine like terms: -116.309518948 + 116.309518948 = 0.000000000 116.309518948 + 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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