## Algebra 1: Common Core (15th Edition)

54$a^{2}$+36a+6
Let a be the lenth of a side of a cube Formula of surface area of a cube: 6$a^{2}$ Plug in value for a: 6$(3a+1)^{2}$ =6(3a+1)(3a+1) =6(9$a^{2}$+3a+3a+1) (FOIL-First Inside Outside Last) =6(9$a^{2}$+6a+1) (Combine like terms) =54$a^{2}$+36a+6