Question

The width of a rectangular frame is 6 in. shorter than its length. The area of the frame is 216 in?

What is the frame's length?

Answer 1

18 in

Explanation:

len = y

width= y - 6

the area of rectangle is len x width

(Y) x (Y-6) = 216

Y^2 - 6Y = 216, Y^2 - 6y -216 = 0

y = (36 /2) or (-24 /2)

len couldn't be negative so 18