Factor out of .

Rewrite as .

Pull terms out from under the radical.

Multiply by .

Factor out of .

Rewrite as .

Pull terms out from under the radical.

Multiply by .

Combine using the product rule for radicals.

Multiply by .

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

Evaluate 4 square root of 50* square root of 80