x^4-25x^2-144=0

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Solution for x^4-25x^2-144=0 equation:


Simplifying
x4 + -25x2 + -144 = 0

Reorder the terms:
-144 + -25x2 + x4 = 0

Solving
-144 + -25x2 + x4 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + -25x2 + 144 + x4 = 0 + 144

Reorder the terms:
-144 + 144 + -25x2 + x4 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + -25x2 + x4 = 0 + 144
-25x2 + x4 = 0 + 144

Combine like terms: 0 + 144 = 144
-25x2 + x4 = 144

The x term is -25x2.  Take half its coefficient (-12.5).
Square it (156.25) and add it to both sides.

Add '156.25' to each side of the equation.
-25x2 + 156.25 + x4 = 144 + 156.25

Reorder the terms:
156.25 + -25x2 + x4 = 144 + 156.25

Combine like terms: 144 + 156.25 = 300.25
156.25 + -25x2 + x4 = 300.25

Factor a perfect square on the left side:
(x2 + -12.5)(x2 + -12.5) = 300.25

Calculate the square root of the right side: 17.327723451

Break this problem into two subproblems by setting 
(x2 + -12.5) equal to 17.327723451 and -17.327723451.

Subproblem 1

x2 + -12.5 = 17.327723451 Simplifying x2 + -12.5 = 17.327723451 Reorder the terms: -12.5 + x2 = 17.327723451 Solving -12.5 + x2 = 17.327723451 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x2 = 17.327723451 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x2 = 17.327723451 + 12.5 x2 = 17.327723451 + 12.5 Combine like terms: 17.327723451 + 12.5 = 29.827723451 x2 = 29.827723451 Simplifying x2 = 29.827723451 Take the square root of each side: x = {-5.461476307, 5.461476307}

Subproblem 2

x2 + -12.5 = -17.327723451 Simplifying x2 + -12.5 = -17.327723451 Reorder the terms: -12.5 + x2 = -17.327723451 Solving -12.5 + x2 = -17.327723451 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12.5' to each side of the equation. -12.5 + 12.5 + x2 = -17.327723451 + 12.5 Combine like terms: -12.5 + 12.5 = 0.0 0.0 + x2 = -17.327723451 + 12.5 x2 = -17.327723451 + 12.5 Combine like terms: -17.327723451 + 12.5 = -4.827723451 x2 = -4.827723451 Simplifying x2 = -4.827723451 Reorder the terms: 4.827723451 + x2 = -4.827723451 + 4.827723451 Combine like terms: -4.827723451 + 4.827723451 = 0.000000000 4.827723451 + 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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