The principal square root.
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You call them principal square roots.
The symbol used to indicate a nonnegative square root.
sqrt(48y2) = sqrt(3*16y2) = sqrt(3)*4y = 6.928y (approx)
The answer to the calculation is simply called the square root.
It seems to be 25. Call your number "x". x = 5 square root of (5 square root of (5 ...) Square it; this will eliminate the outermost square root sign: x squared = 25 times 5 square root of (5 square root of (... Dividing the second equation by the first one, you get: x squared / x = 25 x / x x = 25