a-b= 18/a
B(a-b)=- 12 can be obtained from the square of ab-b.
a-b=- 12/b
Then a-b= 18/a and a-b=- 12/b, 18/a=- 12/b can be converted into a=-2 3b.
B =-2a/3
Bring a=-2 3b into the square of A-AB = 18.
The square of (-3b)-(3b) = 18.
9/4 square +3/2 square = 18.
The square of b = 24/5.
Bring b=-3 2a into ab-b square =- 12.
-2a-(-2a) =- 12 squared.
-2/3a squared -4/9a squared =- 12
The square of a = 54/5.
Then the square of A -AB = 18, and the square of A = 54 gives 5.
You can get the square of ab=a-18.
= 54/5 squared-18
=-36/5
Then the square of A-the square of B = 54/5-24/5 = 6.
The square of a of 2ab+b = 54-2 (-36)+24= 1 and 1.