Rewrite as .

Factor out of .

Rewrite as .

Add parentheses.

Pull terms out from under the radical.

Multiply by .

Rewrite as .

Factor out of .

Rewrite as .

Rewrite as .

Add parentheses.

Pull terms out from under the radical.

Raise to the power of .

Multiply by .

Subtract from .

Combine 7 square root of 72x-6 square root of 32x