SOLUTION: A cube has an edge length represented by x - 3. Find the surface area of the cube.

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
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
Other tutor did x-2, not x-3.

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

SA = 6(x-3)^2 = 6(x^2 - 6x + 9) = 6x^2 - 36x + 54
RELATED QUESTIONS
the length of the edge of a cube is represented as x+3. draw the cube and label its... (answered by drk)
find the surface area of a cube whose edge has a length of... (answered by josmiceli)
A cube has an edge measuring 7 in. What is the surface area of the... (answered by rfer)
Find the surface area of a cube with an edge length of 5 �... (answered by josmiceli)
find the volume and surface area of a cube with an edge length of 10... (answered by scott8148)
An edge of a cube is increased by 10 %.find the %by which the surface area has increased. (answered by josgarithmetic)
Find the surface area of a cube that has an edge measuring 7... (answered by Alan3354)
The length of each edge of a cube is 3 X 10^-2m. Find the total surface area of the cube. (answered by Fombitz)
The surface area of a cube is 24 cm2. Find the new surface area of the cube if the length (answered by Greenfinch)