SOLUTION: Need to figure length= Width= With a width that is 8 units shorter than it's length and covers an area of 240 square units Need equation too

Algebra ->  Rectangles -> SOLUTION: Need to figure length= Width= With a width that is 8 units shorter than it's length and covers an area of 240 square units Need equation too      Log On


   



Question 921846: Need to figure length= Width=
With a width that is 8 units shorter than it's length and covers an area of 240 square units
Need equation too

Answer by JoelSchwartz(130) About Me  (Show Source):
You can put this solution on YOUR website!

w=L-8
A=240
240=wL
240=L(L-8)
240=L^2-8L
L^2-8L-240=0
(L-20)(L+12)=0
((L-20)(L+12))/(L+12)=0/(L+12)
L-20=0
L=20
w=20-8
w=12