b^4-64=

Solution for b^4-64= equation:

Simplifying
b4 + -64 = 0

Reorder the terms:
-64 + b4 = 0

Solving
-64 + b4 = 0

Solving for variable 'b'.

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

Add '64' to each side of the equation.
-64 + 64 + b4 = 0 + 64

Combine like terms: -64 + 64 = 0
0 + b4 = 0 + 64
b4 = 0 + 64

Combine like terms: 0 + 64 = 64
b4 = 64

Simplifying
b4 = 64

Reorder the terms:
-64 + b4 = 64 + -64

Combine like terms: 64 + -64 = 0
-64 + b4 = 0

Factor a difference between two squares.
(8 + b2)(-8 + b2) = 0

Subproblem 1
Set the factor '(8 + b2)' equal to zero and attempt to solve:

Simplifying
8 + b2 = 0

Solving
8 + b2 = 0

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

Add '-8' to each side of the equation.
8 + -8 + b2 = 0 + -8

Combine like terms: 8 + -8 = 0
0 + b2 = 0 + -8
b2 = 0 + -8

Combine like terms: 0 + -8 = -8
b2 = -8

Simplifying
b2 = -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 '(-8 + b2)' equal to zero and attempt to solve:

Simplifying
-8 + b2 = 0

Solving
-8 + b2 = 0

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

Add '8' to each side of the equation.
-8 + 8 + b2 = 0 + 8

Combine like terms: -8 + 8 = 0
0 + b2 = 0 + 8
b2 = 0 + 8

Combine like terms: 0 + 8 = 8
b2 = 8

Simplifying
b2 = 8

Take the square root of each side:
b = {-2.828427125, 2.828427125}
Solution
b = {-2.828427125, 2.828427125}