Interchange the variables.

Rewrite the equation as .

Subtract from both sides of the equation.

To remove the radical on the left side of the equation, square both sides of the equation.

Simplify each side of the equation.

Multiply the exponents in .

Apply the power rule and multiply exponents, .

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Simplify.

Replace the with to show the final answer.

Set up the composite result function.

Evaluate by substituting in the value of into .

Combine the opposite terms in .

Subtract from .

Add and .

Rewrite as .

Use to rewrite as .

Apply the power rule and multiply exponents, .

Combine and .

Cancel the common factor of .

Cancel the common factor.

Divide by .

Simplify.

Since , is the inverse of .

Find the Inverse y = square root of x+8