The area of a rectangle is 99in^2. The length of the rectangle is 2 in. longer than the width. What is the width of the rectangle?

Question

I'm so confused at this moment. I haven't done math in a while haha

Answer 1

width=w

length=w+2

A=l*w

99=w(w+2)

99=w^2+2w

w^2+2w-99=0

(w+11)(w-9)=0

w-9=0

w=9 in

l=11 in

 

another solution

A=l*w

99=9*11 and 11 is 2 more than 9

Answer 2

A=l*w so since your finding the width use the formula width equals the area divided by the length.w=a/L