Jawapan

2016-01-30T20:00:21+08:00
1-2w-w^2=1/2w(w+1)
-w^2-2w+1=1/2w^2+1/2w
w^2+2w-1=-1/2w^2-1/2w
w^2+1/2w^2+2w+1/2w-1=0
3/2w^2+5/2w-1=0
(3w-1)(w+2)=0
w=1/3 or w=-2