a^4-b^4=

Solution for a^4-b^4= equation:

Simplifying
a4 + -1b4 = 0

Solving
a4 + -1b4 = 0

Solving for variable 'a'.

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

Add 'b4' to each side of the equation.
a4 + -1b4 + b4 = 0 + b4

Combine like terms: -1b4 + b4 = 0
a4 + 0 = 0 + b4
a4 = 0 + b4
Remove the zero:
a4 = b4

Simplifying
a4 = b4

Combine like terms: b4 + -1b4 = 0
a4 + -1b4 = 0

Factor a difference between two squares.
(a2 + b2)(a2 + -1b2) = 0

Factor a difference between two squares.
(a2 + b2)((a + b)(a + -1b)) = 0

Subproblem 1
Set the factor '(a2 + b2)' equal to zero and attempt to solve:

Simplifying
a2 + b2 = 0

Solving
a2 + b2 = 0

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

Add '-1b2' to each side of the equation.
a2 + b2 + -1b2 = 0 + -1b2

Combine like terms: b2 + -1b2 = 0
a2 + 0 = 0 + -1b2
a2 = 0 + -1b2
Remove the zero:
a2 = -1b2

Simplifying
a2 = -1b2

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 '(a + b)' equal to zero and attempt to solve:

Simplifying
a + b = 0

Solving
a + b = 0

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

Add '-1b' to each side of the equation.
a + b + -1b = 0 + -1b

Combine like terms: b + -1b = 0
a + 0 = 0 + -1b
a = 0 + -1b
Remove the zero:
a = -1b

Simplifying
a = -1b
Subproblem 3
Set the factor '(a + -1b)' equal to zero and attempt to solve:

Simplifying
a + -1b = 0

Solving
a + -1b = 0

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

Add 'b' to each side of the equation.
a + -1b + b = 0 + b

Combine like terms: -1b + b = 0
a + 0 = 0 + b
a = 0 + b
Remove the zero:
a = b

Simplifying
a = b
Solution
a = {-1b, b}