5x^4-12x^2=27

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Solution for 5x^4-12x^2=27 equation:


Simplifying
5x4 + -12x2 = 27

Reorder the terms:
-12x2 + 5x4 = 27

Solving
-12x2 + 5x4 = 27

Solving for variable 'x'.

Reorder the terms:
-27 + -12x2 + 5x4 = 27 + -27

Combine like terms: 27 + -27 = 0
-27 + -12x2 + 5x4 = 0

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

Divide each side by '5'.
-5.4 + -2.4x2 + x4 = 0

Move the constant term to the right:

Add '5.4' to each side of the equation.
-5.4 + -2.4x2 + 5.4 + x4 = 0 + 5.4

Reorder the terms:
-5.4 + 5.4 + -2.4x2 + x4 = 0 + 5.4

Combine like terms: -5.4 + 5.4 = 0.0
0.0 + -2.4x2 + x4 = 0 + 5.4
-2.4x2 + x4 = 0 + 5.4

Combine like terms: 0 + 5.4 = 5.4
-2.4x2 + x4 = 5.4

The x term is -2.4x2.  Take half its coefficient (-1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
-2.4x2 + 1.44 + x4 = 5.4 + 1.44

Reorder the terms:
1.44 + -2.4x2 + x4 = 5.4 + 1.44

Combine like terms: 5.4 + 1.44 = 6.84
1.44 + -2.4x2 + x4 = 6.84

Factor a perfect square on the left side:
(x2 + -1.2)(x2 + -1.2) = 6.84

Calculate the square root of the right side: 2.615339366

Break this problem into two subproblems by setting 
(x2 + -1.2) equal to 2.615339366 and -2.615339366.

Subproblem 1

x2 + -1.2 = 2.615339366 Simplifying x2 + -1.2 = 2.615339366 Reorder the terms: -1.2 + x2 = 2.615339366 Solving -1.2 + x2 = 2.615339366 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + x2 = 2.615339366 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + x2 = 2.615339366 + 1.2 x2 = 2.615339366 + 1.2 Combine like terms: 2.615339366 + 1.2 = 3.815339366 x2 = 3.815339366 Simplifying x2 = 3.815339366 Take the square root of each side: x = {-1.953289371, 1.953289371}

Subproblem 2

x2 + -1.2 = -2.615339366 Simplifying x2 + -1.2 = -2.615339366 Reorder the terms: -1.2 + x2 = -2.615339366 Solving -1.2 + x2 = -2.615339366 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + x2 = -2.615339366 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + x2 = -2.615339366 + 1.2 x2 = -2.615339366 + 1.2 Combine like terms: -2.615339366 + 1.2 = -1.415339366 x2 = -1.415339366 Simplifying x2 = -1.415339366 Reorder the terms: 1.415339366 + x2 = -1.415339366 + 1.415339366 Combine like terms: -1.415339366 + 1.415339366 = 0.000000000 1.415339366 + 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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