Root number writing specification:

The number or algebraic expression of the root is written in the area surrounded by the right side of the V-shaped part on the left side of the symbol and the lower part of a horizontal part above the symbol, and cannot be out of bounds. If the number of roots or algebraic expression is too long, the upper horizontal part must be extended to ensure the coverage of the root number or algebraic expression below.

The power n of n is written on the left side of the symbol √ ~ When n=2 (square root), n can be ignored, but if it is a cubic root (cubic root), a quartic root, etc. , must write.

Extended data:

Basic skills and methods of quadratic radical simplification;

1, the root sign is a positive integer.

Divide a number into a product of a complete square number and a number, and then put the square root of the complete square number outside the root sign.

2. Below the root symbol is a score.

Divide a fraction into the product of the square of a fraction and a number, and then open the root sign of the fraction outside the root sign.

There are numbers and letters under the root sign.

In this case, because we are not sure whether the letter is positive or negative, we should take the absolute value when opening it.

4. Addition and subtraction of two radicals

Divide two roots first, and then operate.

5. Multiply and divide the two radicals.

Pay attention to the characteristics of the two formulas and decide whether to simplify first and then multiply and divide, or multiply and divide first and then simplify.