xy+z=x(y+z), which of the following must be true?
1)x=0 and z=0
2)x=1 and y=1
3)y=1 and z=0
4)x=1 or y=0
5)x=1 or z=0
ans is 5
1)x=0 and z=0
2)x=1 and y=1
3)y=1 and z=0
4)x=1 or y=0
5)x=1 or z=0
ans is 5
xy+z=xy+xz
z=xz
z(1-x)=0
so either Z = 0 or X =1
You have that in E
