Question

Please help.

Answer 1

The area of a rectangular field is x^2 - x - 72m^2. The length of the field is x + 8m. What is the width of the field in meters?

Answer 2

hint: start by factoring x^2 - x - 72

do you know how to do that?

Answer 3

(x + 8) (x - 9)

Answer 4

good!

now, we have:

area = length * width

now we substitute the values from the problem to get:

x^2 - 72x - 72 = (x + 8) * (x + 9)

Answer 5

Where did you get 72x?

Answer 6

whoops typo

Answer 7

should be -x

Answer 8

Okay.

Answer 9

** should be x - 9