Combine using the product rule for radicals.

Multiply by .

Rewrite as .

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

Evaluate square root of 20* square root of 5

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# Evaluate square root of 20* square root of 5

Combine using the product rule for radicals.

Multiply by .

Rewrite as .

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

Evaluate square root of 20* square root of 5