This diagram shows a SQUARE picture frame which measures 12 cm by 12 cm. The smaller square represents the area where the picture (which is `x` by `x`) will fit.

Figure is not drawn to scale
Brittany wants to cover the white area, the mat, in fabric.
Write an expression that represents the area of fabric that Brittany will need.
    Area of fabric =  
If `x = 9` cm, how much fabric will Brittany need?
    Brittany will need `\text{cm}^2` of fabric.