First, let's simplify each expression separately:

X*x - 16 = x^2 - 16

x*x - 6x + 9 = x^2 - 6x + 9

Now rewrite the original expression with these simplified forms:

(x^2 - 16)/(x - 3) * (x^2 - 6x + 9)/(2x - 8)

Now simplify the expression by factoring and canceling out common factors:

[(x + 4)(x - 4)]/(x - 3) * [(x - 3)^2]/[2(x - 4)]

= (x + 4) * (x - 3) / 2

So, the simplified form of the expression is:

(x + 4) * (x - 3) / 2