Question 463612: A cube has an edge length represented by x - 3. Find the surface area of the cube. Found 2 solutions by graphmatics, richard1234:Answer by graphmatics(170) (Show Source):
You can put this solution on YOUR website! The area of a rectangle is Area = 2LW + 2WH + 2LH.
L = W = H = x-2 so Area = 6(x-2)(x-2) = 6(x^2 -2x - 2x +4)
= 6(x^2 -4x +4) = 6x^2 -24x +24
The surface area of a rectangular prism is SA = 2LW + 2WH + 2LH, but in the case of a cube, it can be reduced to 6s^2, where s is the side length. Here, s = x-3, so
