Question

The length of a rectangle is represented by the function L(x) = 4. The width of that same rectangle is represented by the function W(x) = 7x^2-4x+2. Which of the following shows the area of the rectangle in terms of x?

Answer 1

Answer: 28x^2 -16x + 8

Explanation:

The area is calculated multiplying the length by the width. So,

A = 4.(7x^2 - 4x + 2) = 28x^2 - 16x + 8