Rachael T. answered • 10/05/14
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The numerator, x2-16, is the difference of two perfect squares.
To simplify that part of the question, use the formula.
(x+4)(x-4) <----- square root of x, and square root of 16, adding one and subtracting the other
(x-4)
x+4 because the (x-4) cancels top and bottom
