Simplify the radical expression as much as possible. Assume the variable represents a positive number. 
Definitions:
North American Free Trade Agreement
A trilateral trade bloc agreement between Canada, Mexico, and the United States to reduce trading costs, increase business investment, and help North America be more competitive in the global marketplace.
Free Trade
An economic policy that allows imports and exports between countries with minimal or no tariffs, quotas, or prohibitions.
United States
A country located in North America, bordered by Canada to the north, Mexico to the south, the Atlantic Ocean to the east, and the Pacific Ocean to the west.
Canada
A country located in the northern part of North America, known for its vast landscapes, multicultural communities, and bilingual status (English and French).
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