11x^4+8x^2=1

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Solution for 11x^4+8x^2=1 equation:


Simplifying
11x4 + 8x2 = 1

Reorder the terms:
8x2 + 11x4 = 1

Solving
8x2 + 11x4 = 1

Solving for variable 'x'.

Reorder the terms:
-1 + 8x2 + 11x4 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + 8x2 + 11x4 = 0

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

Divide each side by '11'.
-0.09090909091 + 0.7272727273x2 + x4 = 0

Move the constant term to the right:

Add '0.09090909091' to each side of the equation.
-0.09090909091 + 0.7272727273x2 + 0.09090909091 + x4 = 0 + 0.09090909091

Reorder the terms:
-0.09090909091 + 0.09090909091 + 0.7272727273x2 + x4 = 0 + 0.09090909091

Combine like terms: -0.09090909091 + 0.09090909091 = 0.00000000000
0.00000000000 + 0.7272727273x2 + x4 = 0 + 0.09090909091
0.7272727273x2 + x4 = 0 + 0.09090909091

Combine like terms: 0 + 0.09090909091 = 0.09090909091
0.7272727273x2 + x4 = 0.09090909091

The x term is 0.7272727273x2.  Take half its coefficient (0.3636363637).
Square it (0.1322314050) and add it to both sides.

Add '0.1322314050' to each side of the equation.
0.7272727273x2 + 0.1322314050 + x4 = 0.09090909091 + 0.1322314050

Reorder the terms:
0.1322314050 + 0.7272727273x2 + x4 = 0.09090909091 + 0.1322314050

Combine like terms: 0.09090909091 + 0.1322314050 = 0.22314049591
0.1322314050 + 0.7272727273x2 + x4 = 0.22314049591

Factor a perfect square on the left side:
(x2 + 0.3636363637)(x2 + 0.3636363637) = 0.22314049591

Calculate the square root of the right side: 0.472377493

Break this problem into two subproblems by setting 
(x2 + 0.3636363637) equal to 0.472377493 and -0.472377493.

Subproblem 1

x2 + 0.3636363637 = 0.472377493 Simplifying x2 + 0.3636363637 = 0.472377493 Reorder the terms: 0.3636363637 + x2 = 0.472377493 Solving 0.3636363637 + x2 = 0.472377493 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3636363637' to each side of the equation. 0.3636363637 + -0.3636363637 + x2 = 0.472377493 + -0.3636363637 Combine like terms: 0.3636363637 + -0.3636363637 = 0.0000000000 0.0000000000 + x2 = 0.472377493 + -0.3636363637 x2 = 0.472377493 + -0.3636363637 Combine like terms: 0.472377493 + -0.3636363637 = 0.1087411293 x2 = 0.1087411293 Simplifying x2 = 0.1087411293 Take the square root of each side: x = {-0.329759199, 0.329759199}

Subproblem 2

x2 + 0.3636363637 = -0.472377493 Simplifying x2 + 0.3636363637 = -0.472377493 Reorder the terms: 0.3636363637 + x2 = -0.472377493 Solving 0.3636363637 + x2 = -0.472377493 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3636363637' to each side of the equation. 0.3636363637 + -0.3636363637 + x2 = -0.472377493 + -0.3636363637 Combine like terms: 0.3636363637 + -0.3636363637 = 0.0000000000 0.0000000000 + x2 = -0.472377493 + -0.3636363637 x2 = -0.472377493 + -0.3636363637 Combine like terms: -0.472377493 + -0.3636363637 = -0.8360138567 x2 = -0.8360138567 Simplifying x2 = -0.8360138567 Reorder the terms: 0.8360138567 + x2 = -0.8360138567 + 0.8360138567 Combine like terms: -0.8360138567 + 0.8360138567 = 0.0000000000 0.8360138567 + 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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