the length of a classroom is 4 feet longer then the width.write a polynomial to express the area of the classroom .then calculate the area if the width is 22

Question

need some help 

Answer 1

Let X represent the width of the classroom. The Length is X+4.

 

The area is Length times width  = L * w = X(X+4) = x^2 + 4X

 

If the width is 22, then the length is 26 and the area is 22 * 26 = 572