xy=1 then what is (6^(x+y)^2) / (6^(x-y)^2)
Pick.
A) 1296
B) 4
C) 8
D) 16
E) 32

Rationale: "( x + y ) ^ 2 - ( x - y ) ^ 2 ( x + y + x - y ) ( x + y - x + y ) ( 2 x ) ( 2 y ) 4 xy 4 6 ^ 4 = 1296 answer a"
Answer: A