Question 189339
L=W+4 dm.
LW=192
(W+4)W=192
W^2+4W=192
W^2+4W-192=0
(W+16)(W-12)=0
W-12=0
W=12 ANS. FOR THE WIDTH.
L=12+4=16 ANS. FOR THE LENGTH.
PROOF:
12*16=192
192=192