Question

The width of a rectangle is 6 inches less than its length , and the area is 40 square inches what arebthe lenght and width of the rectangle

Answer 1

Let l and l-6 be the length and width, respectively, of the rectangle. Then:
l(l-6)=40
l²-6l-40=0
(l-10)(l+4)=0
l=10,-4
The rectangle is 10" by 4". ☺☺☺☺