# Graph f(x) = square root of x^2-8

Find the value at .
Replace the variable with in the expression.
Simplify the result.
Raise to the power of .
Subtract from .
Any root of is .
The value at is .
Find the value at .
Replace the variable with in the expression.
Simplify the result.
Raise to the power of .
Subtract from .
Rewrite as .
Factor out of .
Rewrite as .
Pull terms out from under the radical.
The value at is .
Find the value at .
Replace the variable with in the expression.
Simplify the result.
Raise to the power of .
Subtract from .
The value at is .
Find the value at .
Replace the variable with in the expression.
Simplify the result.
Raise to the power of .
Subtract from .
Any root of is .
The value at is .
Find the value at .
Replace the variable with in the expression.
Simplify the result.
Raise to the power of .
Subtract from .
Rewrite as .
Factor out of .
Rewrite as .
Pull terms out from under the radical.