Which point is an x-intercept of the quadratic function f(x) = (x + 6)(x – 3)?
Answer
A
(0,6)
B
(0,–6)
C
(6,0)
D
(–6,0)
Explanation
An x-intercept occurs where f(x) = 0. From f(x) = (x + 6)(x − 3), the zeros are x = −6 and x = 3. The choice showing one of these intercepts is (−6, 0), choice D.
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