It is the RADICAL SIGN , its definition is - the symbol used to indicate a nonnegitive
square root.
If unspecified, the square root is the principal root, which is the positive root.
The radical symbol ( √ ) followed by a line above what's in the radical, designates positive square root.
Radical Sign
The radicand.
Actually a negative number can be under a square root symbol. This becomes very useful in electrical calculations. The square root of -1 is j. That is, j2 = -1.
This
If unspecified, the square root is the principal root, which is the positive root.
The radical symbol ( √ ) followed by a line above what's in the radical, designates positive square root.
There is no special symbol to indicate an irrational number.
The symbol used to indicate a nonnegative square root.
The symbol depicting a smaller square inside a larger one indicate on an appliance indicates that it is double insulated. Some appliances may contain other symbols to indicate this.
Radical Sign
Restricting the discussion to real numbers for now. In this case, the square root is only defined for non-negative numbers; the principal square root of a positive number is the POSITIVE square root. For example, both +5 and -5 are square roots of 25, since both - when squared - give you 25. But the positive square root (+5) is called the principal square root, and if you write the square root symbol, that's the number usually meant.
If a is any number, then a squared = (-a) squared, so one might say that a and -a are both square roots of a squared. However, the square root symbol always means the positive square root.
┴ that one. Sometimes it'll have a small square to indicate a right angle.
The symbol of an element is an abbreviation for the element's name, and it is derived either from the English or the Latin name. For example: Bromine's symbol is Br. The symbol inside an element's square is the element's atomic number, or the number of protons and neutrons in the element.
Write an apostrophe ( ' ) in the cell, before the number.