Step-by-step explanation
In mathematics, when you square a number by 2, this means that you will multiply the given number by itself. For example, given a value of 4
If 4 is squared by 2, it is expressed as;
4^2 = 4 * 4 = 16
As you can see, they value of 4 was multiplied repeatedly twice. That is the meaning of squaring the number or variable by 2.