square radical, also called two cube root (math.), expressed as [√￣], where a non-negative number square radical is called an arithmetic square radical. one positive number has two real square radicals, and they are the opposite number of each other; 0 has only one square radical, which is 0 itself; negative number has two conjugate pure imaginary square radicals.

Generally, "√￣" is used only to indicate an arithmetic square radical, that is, a non-negative square radical. √16=4.