9x^4-279x^2-2396=0

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Solution for 9x^4-279x^2-2396=0 equation:


Simplifying
9x4 + -279x2 + -2396 = 0

Reorder the terms:
-2396 + -279x2 + 9x4 = 0

Solving
-2396 + -279x2 + 9x4 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-266.2222222 + -31x2 + x4 = 0

Move the constant term to the right:

Add '266.2222222' to each side of the equation.
-266.2222222 + -31x2 + 266.2222222 + x4 = 0 + 266.2222222

Reorder the terms:
-266.2222222 + 266.2222222 + -31x2 + x4 = 0 + 266.2222222

Combine like terms: -266.2222222 + 266.2222222 = 0.0000000
0.0000000 + -31x2 + x4 = 0 + 266.2222222
-31x2 + x4 = 0 + 266.2222222

Combine like terms: 0 + 266.2222222 = 266.2222222
-31x2 + x4 = 266.2222222

The x term is -31x2.  Take half its coefficient (-15.5).
Square it (240.25) and add it to both sides.

Add '240.25' to each side of the equation.
-31x2 + 240.25 + x4 = 266.2222222 + 240.25

Reorder the terms:
240.25 + -31x2 + x4 = 266.2222222 + 240.25

Combine like terms: 266.2222222 + 240.25 = 506.4722222
240.25 + -31x2 + x4 = 506.4722222

Factor a perfect square on the left side:
(x2 + -15.5)(x2 + -15.5) = 506.4722222

Calculate the square root of the right side: 22.504937729

Break this problem into two subproblems by setting 
(x2 + -15.5) equal to 22.504937729 and -22.504937729.

Subproblem 1

x2 + -15.5 = 22.504937729 Simplifying x2 + -15.5 = 22.504937729 Reorder the terms: -15.5 + x2 = 22.504937729 Solving -15.5 + x2 = 22.504937729 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15.5' to each side of the equation. -15.5 + 15.5 + x2 = 22.504937729 + 15.5 Combine like terms: -15.5 + 15.5 = 0.0 0.0 + x2 = 22.504937729 + 15.5 x2 = 22.504937729 + 15.5 Combine like terms: 22.504937729 + 15.5 = 38.004937729 x2 = 38.004937729 Simplifying x2 = 38.004937729 Take the square root of each side: x = {-6.164814493, 6.164814493}

Subproblem 2

x2 + -15.5 = -22.504937729 Simplifying x2 + -15.5 = -22.504937729 Reorder the terms: -15.5 + x2 = -22.504937729 Solving -15.5 + x2 = -22.504937729 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '15.5' to each side of the equation. -15.5 + 15.5 + x2 = -22.504937729 + 15.5 Combine like terms: -15.5 + 15.5 = 0.0 0.0 + x2 = -22.504937729 + 15.5 x2 = -22.504937729 + 15.5 Combine like terms: -22.504937729 + 15.5 = -7.004937729 x2 = -7.004937729 Simplifying x2 = -7.004937729 Reorder the terms: 7.004937729 + x2 = -7.004937729 + 7.004937729 Combine like terms: -7.004937729 + 7.004937729 = 0.000000000 7.004937729 + 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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