x^4+4x^2-177=0

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Solution for x^4+4x^2-177=0 equation:


Simplifying
x4 + 4x2 + -177 = 0

Reorder the terms:
-177 + 4x2 + x4 = 0

Solving
-177 + 4x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '177' to each side of the equation.
-177 + 4x2 + 177 + x4 = 0 + 177

Reorder the terms:
-177 + 177 + 4x2 + x4 = 0 + 177

Combine like terms: -177 + 177 = 0
0 + 4x2 + x4 = 0 + 177
4x2 + x4 = 0 + 177

Combine like terms: 0 + 177 = 177
4x2 + x4 = 177

The x term is 4x2.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x2 + 4 + x4 = 177 + 4

Reorder the terms:
4 + 4x2 + x4 = 177 + 4

Combine like terms: 177 + 4 = 181
4 + 4x2 + x4 = 181

Factor a perfect square on the left side:
(x2 + 2)(x2 + 2) = 181

Calculate the square root of the right side: 13.453624047

Break this problem into two subproblems by setting 
(x2 + 2) equal to 13.453624047 and -13.453624047.

Subproblem 1

x2 + 2 = 13.453624047 Simplifying x2 + 2 = 13.453624047 Reorder the terms: 2 + x2 = 13.453624047 Solving 2 + x2 = 13.453624047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x2 = 13.453624047 + -2 Combine like terms: 2 + -2 = 0 0 + x2 = 13.453624047 + -2 x2 = 13.453624047 + -2 Combine like terms: 13.453624047 + -2 = 11.453624047 x2 = 11.453624047 Simplifying x2 = 11.453624047 Take the square root of each side: x = {-3.384320323, 3.384320323}

Subproblem 2

x2 + 2 = -13.453624047 Simplifying x2 + 2 = -13.453624047 Reorder the terms: 2 + x2 = -13.453624047 Solving 2 + x2 = -13.453624047 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x2 = -13.453624047 + -2 Combine like terms: 2 + -2 = 0 0 + x2 = -13.453624047 + -2 x2 = -13.453624047 + -2 Combine like terms: -13.453624047 + -2 = -15.453624047 x2 = -15.453624047 Simplifying x2 = -15.453624047 Reorder the terms: 15.453624047 + x2 = -15.453624047 + 15.453624047 Combine like terms: -15.453624047 + 15.453624047 = 0.000000000 15.453624047 + 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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