The square root of 6 is about 2.449. Radical arithmetic: multiply with the same radical, and multiply the coefficient before the radical as the coefficient of the product; Multiply the root number by the root number, the root index remains unchanged, and then it becomes the simplest root. The root sign, the full name of the square root symbol, is a mathematical symbol. The root sign is a symbol used to represent the root operation of a number or an algebra. The writing, printing and handwriting of the root sign are exactly the same. Write the root number: first draw a short diagonal line in the upper right corner of the middle of the grid, then draw a diagonal line in the lower right center of the stroke, draw a long diagonal line in the same stroke, and then draw a horizontal line with a moderate length near the top of the grid according to your own needs, which is not enough to make up. Write the number or expression of the root: the number or expression of the root is written in the area enclosed by the left V-shaped part 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 expressions is too long, the upper horizontal part must be extended to ensure that it covers the number of roots or expressions below.