3x^4+2x^2-30=0

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Solution for 3x^4+2x^2-30=0 equation:


Simplifying
3x4 + 2x2 + -30 = 0

Reorder the terms:
-30 + 2x2 + 3x4 = 0

Solving
-30 + 2x2 + 3x4 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-10 + 0.6666666667x2 + x4 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + 0.6666666667x2 + 10 + x4 = 0 + 10

Reorder the terms:
-10 + 10 + 0.6666666667x2 + x4 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + 0.6666666667x2 + x4 = 0 + 10
0.6666666667x2 + x4 = 0 + 10

Combine like terms: 0 + 10 = 10
0.6666666667x2 + x4 = 10

The x term is 0.6666666667x2.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667x2 + 0.1111111112 + x4 = 10 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x2 + x4 = 10 + 0.1111111112

Combine like terms: 10 + 0.1111111112 = 10.1111111112
0.1111111112 + 0.6666666667x2 + x4 = 10.1111111112

Factor a perfect square on the left side:
(x2 + 0.3333333334)(x2 + 0.3333333334) = 10.1111111112

Calculate the square root of the right side: 3.179797338

Break this problem into two subproblems by setting 
(x2 + 0.3333333334) equal to 3.179797338 and -3.179797338.

Subproblem 1

x2 + 0.3333333334 = 3.179797338 Simplifying x2 + 0.3333333334 = 3.179797338 Reorder the terms: 0.3333333334 + x2 = 3.179797338 Solving 0.3333333334 + x2 = 3.179797338 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x2 = 3.179797338 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x2 = 3.179797338 + -0.3333333334 x2 = 3.179797338 + -0.3333333334 Combine like terms: 3.179797338 + -0.3333333334 = 2.8464640046 x2 = 2.8464640046 Simplifying x2 = 2.8464640046 Take the square root of each side: x = {-1.687146705, 1.687146705}

Subproblem 2

x2 + 0.3333333334 = -3.179797338 Simplifying x2 + 0.3333333334 = -3.179797338 Reorder the terms: 0.3333333334 + x2 = -3.179797338 Solving 0.3333333334 + x2 = -3.179797338 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x2 = -3.179797338 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x2 = -3.179797338 + -0.3333333334 x2 = -3.179797338 + -0.3333333334 Combine like terms: -3.179797338 + -0.3333333334 = -3.5131306714 x2 = -3.5131306714 Simplifying x2 = -3.5131306714 Reorder the terms: 3.5131306714 + x2 = -3.5131306714 + 3.5131306714 Combine like terms: -3.5131306714 + 3.5131306714 = 0.0000000000 3.5131306714 + x2 = 0.0000000000 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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