Question 58533
L=2W
(2W-4)*(W-4)=2W*W-224
THUS
2W^2-12W+16=2W^2-224
2W^2-2W^2-12W+16=224=0
-12W+240=0
-W+20=0
-W=-20
W=20 IS THE WIDTH
L=2*20
L=40 IS THE LENGTH
PROOF
(40-4)(20-4)=40*20-224
36*16=800-224
576=576