x^4+5x^2-30=0

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Solution for x^4+5x^2-30=0 equation:


Simplifying
x4 + 5x2 + -30 = 0

Reorder the terms:
-30 + 5x2 + x4 = 0

Solving
-30 + 5x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '30' to each side of the equation.
-30 + 5x2 + 30 + x4 = 0 + 30

Reorder the terms:
-30 + 30 + 5x2 + x4 = 0 + 30

Combine like terms: -30 + 30 = 0
0 + 5x2 + x4 = 0 + 30
5x2 + x4 = 0 + 30

Combine like terms: 0 + 30 = 30
5x2 + x4 = 30

The x term is 5x2.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x2 + 6.25 + x4 = 30 + 6.25

Reorder the terms:
6.25 + 5x2 + x4 = 30 + 6.25

Combine like terms: 30 + 6.25 = 36.25
6.25 + 5x2 + x4 = 36.25

Factor a perfect square on the left side:
(x2 + 2.5)(x2 + 2.5) = 36.25

Calculate the square root of the right side: 6.020797289

Break this problem into two subproblems by setting 
(x2 + 2.5) equal to 6.020797289 and -6.020797289.

Subproblem 1

x2 + 2.5 = 6.020797289 Simplifying x2 + 2.5 = 6.020797289 Reorder the terms: 2.5 + x2 = 6.020797289 Solving 2.5 + x2 = 6.020797289 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x2 = 6.020797289 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x2 = 6.020797289 + -2.5 x2 = 6.020797289 + -2.5 Combine like terms: 6.020797289 + -2.5 = 3.520797289 x2 = 3.520797289 Simplifying x2 = 3.520797289 Take the square root of each side: x = {-1.87637877, 1.87637877}

Subproblem 2

x2 + 2.5 = -6.020797289 Simplifying x2 + 2.5 = -6.020797289 Reorder the terms: 2.5 + x2 = -6.020797289 Solving 2.5 + x2 = -6.020797289 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x2 = -6.020797289 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x2 = -6.020797289 + -2.5 x2 = -6.020797289 + -2.5 Combine like terms: -6.020797289 + -2.5 = -8.520797289 x2 = -8.520797289 Simplifying x2 = -8.520797289 Reorder the terms: 8.520797289 + x2 = -8.520797289 + 8.520797289 Combine like terms: -8.520797289 + 8.520797289 = 0.000000000 8.520797289 + x2 = 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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