[tex]\begin{gathered} \text{ The pattern is made up of a }p\text{ by }p\text{ square plus an additional }4p\text{ tiles } \\ \text{ added to each side.} \\ \text{ The total number of tiles is given by the number of tiles in the square } \\ p^2\text{ plus the number of additional tiles }4p. \end{gathered}[/tex]
