Question

How to square number?

Answer 1

`x^2=x \cdot x \\ ----- \\ 1^2=1 \cdot 1 = 1 \\ 2^2=2 \cdot 2 =4 \\ 3^2=3 \cdot 3 =9 \\ 4^2=4 \cdot 4 = 16`