Which point is an x -intercept of the quadratic function f of x is equal to open paren x minus 8 close paren times open paren x plus 9 close paren ?

An x-intercept occurs where f(x) = 0. Since f(x) = (x − 8)(x + 9), the product is zero when x = 8 or x = −9, giving intercepts (8, 0) and (−9, 0). Choice D, (−9, 0), is one of these points.

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