The sides of a rectangle are (2x + 4) cm and (7x + 2) cm. Which expression represents its area?
Note
Area of a rectangle is length × width. Multiply every part: (2x)(7x) = 14x^2, outside and inside terms add to 32x, and 4×2 = 8. So the area is 14x^2 + 32x + 8.