The formula for calculating the root number is √ ab = √ a √ b, and the root number is a mathematical symbol. The root sign means a symbol used to represent the root operation of a number or an algebra. For junior high school mathematics, the meaning of the radical sign is to represent the arithmetic square root, and its nature is that the radical sign A is non-negative, and the square of the radical sign A is equal to the absolute value of A. ..

Square root attribute

The property that the root sign is a square root. Any positive number has two square roots, which are in opposite directions. For example, the arithmetic square root of a positive number is x, the other square root of a is -X, and the square root of zero is zero. Negative numbers have no square root, so they have physical roots and chemical roots. If the product of two algebras containing roots no longer contains roots, then these two algebras are physicochemical roots, also called physicochemical factors.