2x^4-22x^2+41=0

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Solution for 2x^4-22x^2+41=0 equation:


Simplifying
2x4 + -22x2 + 41 = 0

Reorder the terms:
41 + -22x2 + 2x4 = 0

Solving
41 + -22x2 + 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'.
20.5 + -11x2 + x4 = 0

Move the constant term to the right:

Add '-20.5' to each side of the equation.
20.5 + -11x2 + -20.5 + x4 = 0 + -20.5

Reorder the terms:
20.5 + -20.5 + -11x2 + x4 = 0 + -20.5

Combine like terms: 20.5 + -20.5 = 0.0
0.0 + -11x2 + x4 = 0 + -20.5
-11x2 + x4 = 0 + -20.5

Combine like terms: 0 + -20.5 = -20.5
-11x2 + x4 = -20.5

The x term is -11x2.  Take half its coefficient (-5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
-11x2 + 30.25 + x4 = -20.5 + 30.25

Reorder the terms:
30.25 + -11x2 + x4 = -20.5 + 30.25

Combine like terms: -20.5 + 30.25 = 9.75
30.25 + -11x2 + x4 = 9.75

Factor a perfect square on the left side:
(x2 + -5.5)(x2 + -5.5) = 9.75

Calculate the square root of the right side: 3.122498999

Break this problem into two subproblems by setting 
(x2 + -5.5) equal to 3.122498999 and -3.122498999.

Subproblem 1

x2 + -5.5 = 3.122498999 Simplifying x2 + -5.5 = 3.122498999 Reorder the terms: -5.5 + x2 = 3.122498999 Solving -5.5 + x2 = 3.122498999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x2 = 3.122498999 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x2 = 3.122498999 + 5.5 x2 = 3.122498999 + 5.5 Combine like terms: 3.122498999 + 5.5 = 8.622498999 x2 = 8.622498999 Simplifying x2 = 8.622498999 Take the square root of each side: x = {-2.936409202, 2.936409202}

Subproblem 2

x2 + -5.5 = -3.122498999 Simplifying x2 + -5.5 = -3.122498999 Reorder the terms: -5.5 + x2 = -3.122498999 Solving -5.5 + x2 = -3.122498999 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.5' to each side of the equation. -5.5 + 5.5 + x2 = -3.122498999 + 5.5 Combine like terms: -5.5 + 5.5 = 0.0 0.0 + x2 = -3.122498999 + 5.5 x2 = -3.122498999 + 5.5 Combine like terms: -3.122498999 + 5.5 = 2.377501001 x2 = 2.377501001 Simplifying x2 = 2.377501001 Take the square root of each side: x = {-1.541914719, 1.541914719}

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.936409202, 2.936409202, -1.541914719, 1.541914719}

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