Question

The area of a rectangle is y^2-4y-45 square inches. Which expression represents a possible length for the rectangle?

A y+5
B y+9
C y-5
D y-45

Answer 1

1. Ask: Which two numbers add up to -4 and multiply to -45?
-9 and 5

2. Rewrite expression using the above
(y-9)(y+5)

3. Your answer:
Your answer will be a. Have a nice day :D