To know how to open the square root, we must first understand the formula of the square root.

1, using the formula, we can know that the square of 2 is 2*2=4, so √4 is equal to 2 after root. It can also be seen that √9=3, √ 169= 13?

2. Square root = 1.4 14 (three decimal places are reserved). Can be calculated according to the calculation chart.

Extended data:

formula

If the square of a nonnegative X is equal to A, that is, 0, then this nonnegative X is called the arithmetic square root of A, and the arithmetic square root of A is called "root number A" and A is called radix. The operation of finding the square root of a non-negative number is called square root.

Conclusion: The greater the number of roots, the greater the corresponding arithmetic square root (true for all positive numbers).

If a positive number has a square root, then there must be two, and it is reciprocal. Obviously, if we know one of these two square roots, we can get the other square root in time according to the concept of reciprocal.

References:

Baidu encyclopedia-square root