Question

the area of a rectangle is 8x^2 + 2x-1. the width of the rectangle is 4x-1. what is the length of the rectangle

Answer 1

(2x+1)

Explanation:

since area = length * width, you can factor the area to get the length (since you are given the width)

8x^2 + 2x - 1 = (4x-1) (2x+1)

since width is 4x-1, length must be 2x+1