x^4+72x^2+64=0

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Solution for x^4+72x^2+64=0 equation:


Simplifying
x4 + 72x2 + 64 = 0

Reorder the terms:
64 + 72x2 + x4 = 0

Solving
64 + 72x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-64' to each side of the equation.
64 + 72x2 + -64 + x4 = 0 + -64

Reorder the terms:
64 + -64 + 72x2 + x4 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + 72x2 + x4 = 0 + -64
72x2 + x4 = 0 + -64

Combine like terms: 0 + -64 = -64
72x2 + x4 = -64

The x term is 72x2.  Take half its coefficient (36).
Square it (1296) and add it to both sides.

Add '1296' to each side of the equation.
72x2 + 1296 + x4 = -64 + 1296

Reorder the terms:
1296 + 72x2 + x4 = -64 + 1296

Combine like terms: -64 + 1296 = 1232
1296 + 72x2 + x4 = 1232

Factor a perfect square on the left side:
(x2 + 36)(x2 + 36) = 1232

Calculate the square root of the right side: 35.09985755

Break this problem into two subproblems by setting 
(x2 + 36) equal to 35.09985755 and -35.09985755.

Subproblem 1

x2 + 36 = 35.09985755 Simplifying x2 + 36 = 35.09985755 Reorder the terms: 36 + x2 = 35.09985755 Solving 36 + x2 = 35.09985755 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-36' to each side of the equation. 36 + -36 + x2 = 35.09985755 + -36 Combine like terms: 36 + -36 = 0 0 + x2 = 35.09985755 + -36 x2 = 35.09985755 + -36 Combine like terms: 35.09985755 + -36 = -0.90014245 x2 = -0.90014245 Simplifying x2 = -0.90014245 Reorder the terms: 0.90014245 + x2 = -0.90014245 + 0.90014245 Combine like terms: -0.90014245 + 0.90014245 = 0.00000000 0.90014245 + x2 = 0.00000000 The solution to this equation could not be determined.This subproblem is being ignored because a solution could not be determined.

Subproblem 2

x2 + 36 = -35.09985755 Simplifying x2 + 36 = -35.09985755 Reorder the terms: 36 + x2 = -35.09985755 Solving 36 + x2 = -35.09985755 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-36' to each side of the equation. 36 + -36 + x2 = -35.09985755 + -36 Combine like terms: 36 + -36 = 0 0 + x2 = -35.09985755 + -36 x2 = -35.09985755 + -36 Combine like terms: -35.09985755 + -36 = -71.09985755 x2 = -71.09985755 Simplifying x2 = -71.09985755 Reorder the terms: 71.09985755 + x2 = -71.09985755 + 71.09985755 Combine like terms: -71.09985755 + 71.09985755 = 0.00000000 71.09985755 + x2 = 0.00000000 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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