Question 278296
x+8 is length
x is width, OK
x(x+8)=240

x^2+8x=240
x^2+8x-240=0
(x+20)(x-12)=0
X cannot be negative, so x must be 12.
SO, 20 is length
12 is length

Don't be afraid of quadratic equations!!!! Do the WORK!! LOL Good night.