alt 251 on the keypad
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To type the square root symbol on ypur keyboard press and hold alt and type 251.
The square root symbol is like a tick with a line connected to the top. Go to http://en.wikipedia.org/wiki/Square_root and the square root symbol is displayed.
If unspecified, the square root is the principal root, which is the positive root.
The answer is: radical 99. I can't type the square-root symbol, but that is what you use. It's something like this: ____ \/ 99 This is radical 99.
The square root symbol (√) was first used in 1525, by Christoph Rudolff, and is called a radical.