Set equal to .

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.

Raising to any positive power yields .

Add to both sides of the equation.

Find the Roots (Zeros) f(x) = square root of x-4