they cancel each other out. the square root of 5 raised to the second power = 5
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It is the perfect square of that number.
Sqrt[5*radical(68)] = -6.4211 and +6.4211.
Technically,no. A radical equation has a radical (Square root) in it, and has two solutions because the square root can be positive or negative.
radical expressiona radical expression
2 radical 13