Question 342111
P=2L+2W
26=2L+2W
2L=26-2W
L=(26-2W)/2
L=13-W
A=LW
42=(13-W)W
42=13W-W^2
W^2-13W+42=0
(W-7)(W-6)=0
W-7=0
W=7 ANS 
L=13-7=6 ANS.
W-6=0
W=6 ANS
L=13-6=7 ANS.
PROOF
26=2*6+2*7
26=12+14
26=26
42=6*7
42=42