2x^4+12x^2-7=0

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Solution for 2x^4+12x^2-7=0 equation:


Simplifying
2x4 + 12x2 + -7 = 0

Reorder the terms:
-7 + 12x2 + 2x4 = 0

Solving
-7 + 12x2 + 2x4 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-3.5 + 6x2 + x4 = 0

Move the constant term to the right:

Add '3.5' to each side of the equation.
-3.5 + 6x2 + 3.5 + x4 = 0 + 3.5

Reorder the terms:
-3.5 + 3.5 + 6x2 + x4 = 0 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + 6x2 + x4 = 0 + 3.5
6x2 + x4 = 0 + 3.5

Combine like terms: 0 + 3.5 = 3.5
6x2 + x4 = 3.5

The x term is 6x2.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x2 + 9 + x4 = 3.5 + 9

Reorder the terms:
9 + 6x2 + x4 = 3.5 + 9

Combine like terms: 3.5 + 9 = 12.5
9 + 6x2 + x4 = 12.5

Factor a perfect square on the left side:
(x2 + 3)(x2 + 3) = 12.5

Calculate the square root of the right side: 3.535533906

Break this problem into two subproblems by setting 
(x2 + 3) equal to 3.535533906 and -3.535533906.

Subproblem 1

x2 + 3 = 3.535533906 Simplifying x2 + 3 = 3.535533906 Reorder the terms: 3 + x2 = 3.535533906 Solving 3 + x2 = 3.535533906 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x2 = 3.535533906 + -3 Combine like terms: 3 + -3 = 0 0 + x2 = 3.535533906 + -3 x2 = 3.535533906 + -3 Combine like terms: 3.535533906 + -3 = 0.535533906 x2 = 0.535533906 Simplifying x2 = 0.535533906 Take the square root of each side: x = {-0.731801822, 0.731801822}

Subproblem 2

x2 + 3 = -3.535533906 Simplifying x2 + 3 = -3.535533906 Reorder the terms: 3 + x2 = -3.535533906 Solving 3 + x2 = -3.535533906 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x2 = -3.535533906 + -3 Combine like terms: 3 + -3 = 0 0 + x2 = -3.535533906 + -3 x2 = -3.535533906 + -3 Combine like terms: -3.535533906 + -3 = -6.535533906 x2 = -6.535533906 Simplifying x2 = -6.535533906 Reorder the terms: 6.535533906 + x2 = -6.535533906 + 6.535533906 Combine like terms: -6.535533906 + 6.535533906 = 0.000000000 6.535533906 + 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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