we are asked to determine the surface area of a cube that has a side length of 12 cm.
To do that let's remember that a cube has 6 faces and the area of each face is its side length squared. Therefore, the total surface area is the side length squared multiplied by 6:
[tex]A=6(12\operatorname{cm})^2[/tex]Solving the operation:
[tex]A=864cm^2[/tex]