xy=1 then what is (4^(x+y)^2) / (4^(x-y)^2)
Pick one:
A) 256 B) 4 C) 8 D) 16 E) 32
(x+y)^2 - (x-y)^2   (x+y+x-y)(x+y-x+y)   (2x)(2y)   4xy   4   4^4 = 256   256nswer 256
<result>A</result>
xy=1 then what is (4^(x+y)^2) / (4^(x-y)^2)