Question

The area of a rectangle is x2 - 2x - 15 and the length of the rectangle is x + 3. Find the width of the rectangle.

A. x – 5

B. x2 + 15

C. x + 5

D. (x – 2)(x + 3)

Answer 1

length*width = area....
dividing both sides by length we get
W=A/L

width =(x2-2x-15)/x+3
factorizing the numerator we get
(x+3)(x-5)/(x+3)

=x-5
so width is x-5

Answer 2

thank you!