Rewrite as .

Factor out of .

Rewrite as .

Add parentheses.

Pull terms out from under the radical.

Multiply by .

Multiply and .

Move .

Raise to the power of .

Raise to the power of .

Use the power rule to combine exponents.

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.

Multiply by .

Simplify 1/( square root of 45z)