x^4-30x^2-216=0

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Solution for x^4-30x^2-216=0 equation:


Simplifying
x4 + -30x2 + -216 = 0

Reorder the terms:
-216 + -30x2 + x4 = 0

Solving
-216 + -30x2 + x4 = 0

Solving for variable 'x'.

Factor a trinomial.
(-6 + -1x2)(36 + -1x2) = 0

Factor a difference between two squares.
(-6 + -1x2)((6 + x)(6 + -1x)) = 0

Subproblem 1

Set the factor '(-6 + -1x2)' equal to zero and attempt to solve: Simplifying -6 + -1x2 = 0 Solving -6 + -1x2 = 0 Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -1x2 = 0 + 6 Combine like terms: -6 + 6 = 0 0 + -1x2 = 0 + 6 -1x2 = 0 + 6 Combine like terms: 0 + 6 = 6 -1x2 = 6 Divide each side by '-1'. x2 = -6 Simplifying x2 = -6 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(6 + x)' equal to zero and attempt to solve: Simplifying 6 + x = 0 Solving 6 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + x = 0 + -6 x = 0 + -6 Combine like terms: 0 + -6 = -6 x = -6 Simplifying x = -6

Subproblem 3

Set the factor '(6 + -1x)' equal to zero and attempt to solve: Simplifying 6 + -1x = 0 Solving 6 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + -1x = 0 + -6 Combine like terms: 6 + -6 = 0 0 + -1x = 0 + -6 -1x = 0 + -6 Combine like terms: 0 + -6 = -6 -1x = -6 Divide each side by '-1'. x = 6 Simplifying x = 6

Solution

x = {-6, 6}

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