2.4x^4-36.4x^2=-9.2

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Solution for 2.4x^4-36.4x^2=-9.2 equation:


Simplifying
2.4x4 + -36.4x2 = -9.2

Reorder the terms:
-36.4x2 + 2.4x4 = -9.2

Solving
-36.4x2 + 2.4x4 = -9.2

Solving for variable 'x'.

Reorder the terms:
9.2 + -36.4x2 + 2.4x4 = -9.2 + 9.2

Combine like terms: -9.2 + 9.2 = 0.0
9.2 + -36.4x2 + 2.4x4 = 0.0

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

Divide each side by '2.4'.
3.833333333 + -15.16666667x2 + x4 = 0

Move the constant term to the right:

Add '-3.833333333' to each side of the equation.
3.833333333 + -15.16666667x2 + -3.833333333 + x4 = 0 + -3.833333333

Reorder the terms:
3.833333333 + -3.833333333 + -15.16666667x2 + x4 = 0 + -3.833333333

Combine like terms: 3.833333333 + -3.833333333 = 0.000000000
0.000000000 + -15.16666667x2 + x4 = 0 + -3.833333333
-15.16666667x2 + x4 = 0 + -3.833333333

Combine like terms: 0 + -3.833333333 = -3.833333333
-15.16666667x2 + x4 = -3.833333333

The x term is -15.16666667x2.  Take half its coefficient (-7.583333335).
Square it (57.50694447) and add it to both sides.

Add '57.50694447' to each side of the equation.
-15.16666667x2 + 57.50694447 + x4 = -3.833333333 + 57.50694447

Reorder the terms:
57.50694447 + -15.16666667x2 + x4 = -3.833333333 + 57.50694447

Combine like terms: -3.833333333 + 57.50694447 = 53.673611137
57.50694447 + -15.16666667x2 + x4 = 53.673611137

Factor a perfect square on the left side:
(x2 + -7.583333335)(x2 + -7.583333335) = 53.673611137

Calculate the square root of the right side: 7.32622762

Break this problem into two subproblems by setting 
(x2 + -7.583333335) equal to 7.32622762 and -7.32622762.

Subproblem 1

x2 + -7.583333335 = 7.32622762 Simplifying x2 + -7.583333335 = 7.32622762 Reorder the terms: -7.583333335 + x2 = 7.32622762 Solving -7.583333335 + x2 = 7.32622762 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.583333335' to each side of the equation. -7.583333335 + 7.583333335 + x2 = 7.32622762 + 7.583333335 Combine like terms: -7.583333335 + 7.583333335 = 0.000000000 0.000000000 + x2 = 7.32622762 + 7.583333335 x2 = 7.32622762 + 7.583333335 Combine like terms: 7.32622762 + 7.583333335 = 14.909560955 x2 = 14.909560955 Simplifying x2 = 14.909560955 Take the square root of each side: x = {-3.861290064, 3.861290064}

Subproblem 2

x2 + -7.583333335 = -7.32622762 Simplifying x2 + -7.583333335 = -7.32622762 Reorder the terms: -7.583333335 + x2 = -7.32622762 Solving -7.583333335 + x2 = -7.32622762 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7.583333335' to each side of the equation. -7.583333335 + 7.583333335 + x2 = -7.32622762 + 7.583333335 Combine like terms: -7.583333335 + 7.583333335 = 0.000000000 0.000000000 + x2 = -7.32622762 + 7.583333335 x2 = -7.32622762 + 7.583333335 Combine like terms: -7.32622762 + 7.583333335 = 0.257105715 x2 = 0.257105715 Simplifying x2 = 0.257105715 Take the square root of each side: x = {-0.507055929, 0.507055929}

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-3.861290064, 3.861290064, -0.507055929, 0.507055929}

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