Hi,        
Let x, (x+2),(x+4) represent the three consecutive positive even integers
Question States***
 x(x+2) = (x+4)^2 - 64
solving for x
 x^2 + 2x = x^2 + 8x + 16 - 64
       48 = 6x
        x = 8, the first of the three.  The Second Integer is 10
CHECKING our Answer*****
 8*10 = 144 - 64