a^4-25=

Solution for a^4-25= equation:

Simplifying
a4 + -25 = 0

Reorder the terms:
-25 + a4 = 0

Solving
-25 + a4 = 0

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '25' to each side of the equation.
-25 + 25 + a4 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + a4 = 0 + 25
a4 = 0 + 25

Combine like terms: 0 + 25 = 25
a4 = 25

Simplifying
a4 = 25

Reorder the terms:
-25 + a4 = 25 + -25

Combine like terms: 25 + -25 = 0
-25 + a4 = 0

Factor a difference between two squares.
(5 + a2)(-5 + a2) = 0

Subproblem 1
Set the factor '(5 + a2)' equal to zero and attempt to solve:

Simplifying
5 + a2 = 0

Solving
5 + a2 = 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 + a2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + a2 = 0 + -5
a2 = 0 + -5

Combine like terms: 0 + -5 = -5
a2 = -5

Simplifying
a2 = -5

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 + a2)' equal to zero and attempt to solve:

Simplifying
-5 + a2 = 0

Solving
-5 + a2 = 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 + a2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + a2 = 0 + 5
a2 = 0 + 5

Combine like terms: 0 + 5 = 5
a2 = 5

Simplifying
a2 = 5

Take the square root of each side:
a = {-2.236067978, 2.236067978}
Solution
a = {-2.236067978, 2.236067978}