I want to find the general solution to
so I let and
Would be OK to now do any of the following:
Let a=1,b=0,c=1, and d=2 (then )
Let a=0,b=1, c=1,and d=2 (then )
Let a=1, b=0, c=1/2, d=1 (then then )
Let a=1, b=2, c= -1, d=0 (then then )
Are there any values that would somehow lead me to the incorrect solution?