Given a * a + b * b-6a-8b + 25 = 0, find the value of B / A-A / b

Given a * a + b * b-6a-8b + 25 = 0, find the value of B / A-A / b

That is, (A & sup2; - 6A + 9) + (B & sup2; - 8b + 16) = 0
(a-3)²+(b-4)²=0
If one is greater than 0, the other is less than 0
So both are equal to zero
So a = 3, B = 4
b/a-a/b=4/3-3/4=7/12