a^4+a^2-56=0

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Solution for a^4+a^2-56=0 equation:


Simplifying
a4 + a2 + -56 = 0

Reorder the terms:
-56 + a2 + a4 = 0

Solving
-56 + a2 + a4 = 0

Solving for variable 'a'.

Factor a trinomial.
(-8 + -1a2)(7 + -1a2) = 0

Subproblem 1

Set the factor '(-8 + -1a2)' equal to zero and attempt to solve: Simplifying -8 + -1a2 = 0 Solving -8 + -1a2 = 0 Move all terms containing a to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + -1a2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -1a2 = 0 + 8 -1a2 = 0 + 8 Combine like terms: 0 + 8 = 8 -1a2 = 8 Divide each side by '-1'. a2 = -8 Simplifying a2 = -8 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 '(7 + -1a2)' equal to zero and attempt to solve: Simplifying 7 + -1a2 = 0 Solving 7 + -1a2 = 0 Move all terms containing a to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -1a2 = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -1a2 = 0 + -7 -1a2 = 0 + -7 Combine like terms: 0 + -7 = -7 -1a2 = -7 Divide each side by '-1'. a2 = 7 Simplifying a2 = 7 Take the square root of each side: a = {-2.645751311, 2.645751311}

Solution

a = {-2.645751311, 2.645751311}

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