Question

The area of a rectangle is x 2 – 3x – 28. If the

length is x + 4, find the width.

Answer 1

-4 square units

Explanation:

a = l × b

x2 - 3x - 28 = (x +4)(×)

x2 - 3x - 28 = x2 + 4x

-3x - 28 - 4x = 0

-7x - 28 = 0

-7x = 28

x = -4