The sides of a rectangle are (6x + 2) cm and (4x + 2) cm. Which expression represents its area?
Note
Area of a rectangle is length × width. Multiply every part: (6x)(4x) = 24x^2, outside and inside terms add to 20x, and 2×2 = 4. So the area is 24x^2 + 20x + 4.