If xy+yx=−1 the value of x3−y3 is
If xy+yx=−1, where x,y≠0 then the value of (x3−y3) is (a) 1
(b)−1
(c) 0
(d) 12
if x/y+y/x = -1 (x,y is not equal to 0 ) then x3-y3 = ?