c - a = -1 You mistakenly have this as positive one in your post.
This is just a typo, sorry for that:
d) ac=2; (c-a)=1; I would find very tasteful a=2; c=1;
(1-2)=-1
I'm looking for you to show the steps in solving the system of simultaneous equations above.
Sorry, I fear I will disappoint you (as I already said, there are few possibilities, so a brute force approach will solve the system in seconds while I would spend hours due to algebra errors):
for a in [-2,-1,1,2]:
c=int(2/a)
for b in [-2,-1,1,2]:
d=int(-2/b)
if(d-b==3):
if(a*d+b*c==3):
print("a=",a,"c=",c,"b=",b,"d=",d,"ad+bc=",a*d+b*c,"d-b=",d-b)
print(a*c,"x2+",a*d+b*c,"xy+",b*d,"y2+",c-a,"x+",d-b,"y-1")
The problem does not have to be solved by a system of equations,
As no one else posts and I have no other idea how to solve it, can you post the solution?