Simplify square root of 400

Problem

√(,400)

Solution

1. Identify the number inside the radical, which is 400

2. Recognize that 400 is a perfect square because 20×20=400

3. Apply the definition of a square root, which states that √(,x2)=x for x≥0

4. Simplify the expression by taking the square root of 20

Final Answer

√(,400)=20

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