(2) When a = 0, it is obviously parallel, and when a is not 0.
- 1/(2a)=(3a- 1)/a
a= 1/6
So a=0 or a= 1/6.
(3)a is all real numbers
6.-4a(a- 1)=- 1
a=( 1 √2)/2
7.-2m/4=- 1/(m+ 1)
m= 1,-2
Note that when m=-2, two straight lines coincide.
So when m= 1, it is parallel.
M is not equal to 1, and intersects when m is not equal to -2.
8.KAD=KBC=3/4, KEB =KCD=-3/4.
square