Rewrite as .

Apply the distributive property.

Apply the distributive property.

Apply the distributive property.

Simplify each term.

Multiply by .

Move to the left of .

Combine using the product rule for radicals.

Multiply by .

Rewrite as .

Pull terms out from under the radical, assuming positive real numbers.

Add and .

Add and .

The result can be shown in multiple forms.

Exact Form:

Decimal Form:

Evaluate (4+ square root of 5)^2