What is the midpoint of the x-intercepts off(x) = (x – 4)(x + 4)?

Set each factor equal to zero: x − 4 = 0 gives x = 4, and x + 4 = 0 gives x = −4. The x-intercepts are (4, 0) and (−4, 0); their midpoint is ((4 + (−4))/2, (0 + 0)/2) = (0, 0), choice A.

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