3x^4+7x^2+1=0

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Solution for 3x^4+7x^2+1=0 equation:


Simplifying
3x4 + 7x2 + 1 = 0

Reorder the terms:
1 + 7x2 + 3x4 = 0

Solving
1 + 7x2 + 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'.
0.3333333333 + 2.333333333x2 + x4 = 0

Move the constant term to the right:

Add '-0.3333333333' to each side of the equation.
0.3333333333 + 2.333333333x2 + -0.3333333333 + x4 = 0 + -0.3333333333

Reorder the terms:
0.3333333333 + -0.3333333333 + 2.333333333x2 + x4 = 0 + -0.3333333333

Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000
0.0000000000 + 2.333333333x2 + x4 = 0 + -0.3333333333
2.333333333x2 + x4 = 0 + -0.3333333333

Combine like terms: 0 + -0.3333333333 = -0.3333333333
2.333333333x2 + x4 = -0.3333333333

The x term is 2.333333333x2.  Take half its coefficient (1.166666667).
Square it (1.361111112) and add it to both sides.

Add '1.361111112' to each side of the equation.
2.333333333x2 + 1.361111112 + x4 = -0.3333333333 + 1.361111112

Reorder the terms:
1.361111112 + 2.333333333x2 + x4 = -0.3333333333 + 1.361111112

Combine like terms: -0.3333333333 + 1.361111112 = 1.0277777787
1.361111112 + 2.333333333x2 + x4 = 1.0277777787

Factor a perfect square on the left side:
(x2 + 1.166666667)(x2 + 1.166666667) = 1.0277777787

Calculate the square root of the right side: 1.013793756

Break this problem into two subproblems by setting 
(x2 + 1.166666667) equal to 1.013793756 and -1.013793756.

Subproblem 1

x2 + 1.166666667 = 1.013793756 Simplifying x2 + 1.166666667 = 1.013793756 Reorder the terms: 1.166666667 + x2 = 1.013793756 Solving 1.166666667 + x2 = 1.013793756 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x2 = 1.013793756 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x2 = 1.013793756 + -1.166666667 x2 = 1.013793756 + -1.166666667 Combine like terms: 1.013793756 + -1.166666667 = -0.152872911 x2 = -0.152872911 Simplifying x2 = -0.152872911 Reorder the terms: 0.152872911 + x2 = -0.152872911 + 0.152872911 Combine like terms: -0.152872911 + 0.152872911 = 0.000000000 0.152872911 + x2 = 0.000000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

x2 + 1.166666667 = -1.013793756 Simplifying x2 + 1.166666667 = -1.013793756 Reorder the terms: 1.166666667 + x2 = -1.013793756 Solving 1.166666667 + x2 = -1.013793756 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.166666667' to each side of the equation. 1.166666667 + -1.166666667 + x2 = -1.013793756 + -1.166666667 Combine like terms: 1.166666667 + -1.166666667 = 0.000000000 0.000000000 + x2 = -1.013793756 + -1.166666667 x2 = -1.013793756 + -1.166666667 Combine like terms: -1.013793756 + -1.166666667 = -2.180460423 x2 = -2.180460423 Simplifying x2 = -2.180460423 Reorder the terms: 2.180460423 + x2 = -2.180460423 + 2.180460423 Combine like terms: -2.180460423 + 2.180460423 = 0.000000000 2.180460423 + 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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