Square root
Let The square root of x means the real number, for which
Squaring can be done separately, if all conditions are satisfied:
1.
2.
Examples:
1.
2.
3.
4.
5.
Example 6.
In this example, the parameter a must be postive. However, the same deduction cannot be done for the parameter b, as squaring loses information on the sign:
Example 7.
Example 8.