Which point is an x-intercept of the quadratic function f(x) = (x – 4)(x + 2)?

An x-intercept occurs where f(x) = 0. Set (x − 4)(x + 2) = 0; this gives x = 4 or x = −2, so the intercepts are (4, 0) and (−2, 0). Choice B, (−2, 0), is an x-intercept.

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