Two integers, G and H, have a product of -35. What is the greatest possible some of G and H

one is plus, the other minus, I will use absolute values

|G| = x
|H| = y
x y = 35
x - y = quantity to be maximized
try 7 and 5 --> 2
what other integers?
just 1 and 35
35 - 1 = 34
well I guess 35 and -1 is the best we can do and 34 is it