I must assume you mean:
[(x^2 - 4) / (x - 8)] / [x - 2] -----> express this way:
[(x^2 - 4)] / [(x - 8)(x - 2)]
But x^2 - 4 = x^2 - 2^2, which is a difference of squares: a^2 - b^2 = (a + b)(a - b) ----->
[(x + 2)(x - 2)] / [(x - 8)(x - 2)] -----> (x - 2) gets cancelled out ----->
(x + 2) / (x - 8)
That's your answer. I hope this helps
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