4x^4+13x^2-6=0

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Solution for 4x^4+13x^2-6=0 equation:


Simplifying
4x4 + 13x2 + -6 = 0

Reorder the terms:
-6 + 13x2 + 4x4 = 0

Solving
-6 + 13x2 + 4x4 = 0

Solving for variable 'x'.

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

Divide each side by '4'.
-1.5 + 3.25x2 + x4 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + 3.25x2 + 1.5 + x4 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + 3.25x2 + x4 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + 3.25x2 + x4 = 0 + 1.5
3.25x2 + x4 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
3.25x2 + x4 = 1.5

The x term is 3.25x2.  Take half its coefficient (1.625).
Square it (2.640625) and add it to both sides.

Add '2.640625' to each side of the equation.
3.25x2 + 2.640625 + x4 = 1.5 + 2.640625

Reorder the terms:
2.640625 + 3.25x2 + x4 = 1.5 + 2.640625

Combine like terms: 1.5 + 2.640625 = 4.140625
2.640625 + 3.25x2 + x4 = 4.140625

Factor a perfect square on the left side:
(x2 + 1.625)(x2 + 1.625) = 4.140625

Calculate the square root of the right side: 2.034852575

Break this problem into two subproblems by setting 
(x2 + 1.625) equal to 2.034852575 and -2.034852575.

Subproblem 1

x2 + 1.625 = 2.034852575 Simplifying x2 + 1.625 = 2.034852575 Reorder the terms: 1.625 + x2 = 2.034852575 Solving 1.625 + x2 = 2.034852575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.625' to each side of the equation. 1.625 + -1.625 + x2 = 2.034852575 + -1.625 Combine like terms: 1.625 + -1.625 = 0.000 0.000 + x2 = 2.034852575 + -1.625 x2 = 2.034852575 + -1.625 Combine like terms: 2.034852575 + -1.625 = 0.409852575 x2 = 0.409852575 Simplifying x2 = 0.409852575 Take the square root of each side: x = {-0.640197294, 0.640197294}

Subproblem 2

x2 + 1.625 = -2.034852575 Simplifying x2 + 1.625 = -2.034852575 Reorder the terms: 1.625 + x2 = -2.034852575 Solving 1.625 + x2 = -2.034852575 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.625' to each side of the equation. 1.625 + -1.625 + x2 = -2.034852575 + -1.625 Combine like terms: 1.625 + -1.625 = 0.000 0.000 + x2 = -2.034852575 + -1.625 x2 = -2.034852575 + -1.625 Combine like terms: -2.034852575 + -1.625 = -3.659852575 x2 = -3.659852575 Simplifying x2 = -3.659852575 Reorder the terms: 3.659852575 + x2 = -3.659852575 + 3.659852575 Combine like terms: -3.659852575 + 3.659852575 = 0.000000000 3.659852575 + 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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