a^4-4a^2-5=0

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Solution for a^4-4a^2-5=0 equation:


Simplifying
a4 + -4a2 + -5 = 0

Reorder the terms:
-5 + -4a2 + a4 = 0

Solving
-5 + -4a2 + a4 = 0

Solving for variable 'a'.

Factor a trinomial.
(-1 + -1a2)(5 + -1a2) = 0

Subproblem 1

Set the factor '(-1 + -1a2)' equal to zero and attempt to solve: Simplifying -1 + -1a2 = 0 Solving -1 + -1a2 = 0 Move all terms containing a to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -1a2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1a2 = 0 + 1 -1a2 = 0 + 1 Combine like terms: 0 + 1 = 1 -1a2 = 1 Divide each side by '-1'. a2 = -1 Simplifying a2 = -1 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 '(5 + -1a2)' equal to zero and attempt to solve: Simplifying 5 + -1a2 = 0 Solving 5 + -1a2 = 0 Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -1a2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1a2 = 0 + -5 -1a2 = 0 + -5 Combine like terms: 0 + -5 = -5 -1a2 = -5 Divide each side by '-1'. a2 = 5 Simplifying a2 = 5 Take the square root of each side: a = {-2.236067978, 2.236067978}

Solution

a = {-2.236067978, 2.236067978}

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