The square root of a number is a nonnegative number which when multiplied by itself equals the given number..
Square Root Function:
, x ≥ 0 is a square root function.
The following are some properties of square root functions. These properties are true for all positive real numbers a and b 

A. 7
B. 28
C. 42
D. 14
Correct Answer: D
Step 1: Square root of 196 =
.
Step 2:
[Since 14 × 14 = 196.]