Question

The length of a rectangular sandbox is 4 feet less than its width, which is represented by x. The area is 45 square feet. Which equation can be used to find the area of this sandbox?

1.x^2+4=45
2.x(x+4)=45
3.x(x-4)=45
4.x(2x+4)=45

Answer 1

3

Explanation:

w= x

l= x-4

x(x-4) = 45

x^2-4x = 45