Zeros of a function

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"Zeros" of a function are the x-intercepts of the graph, also known as "roots" or "solutions".

The x-intercepts shown in the graph are (-6,0) , (-4,0) , (2,0), and (6,0).  However, not all are zeros of the function.

To solve the function, set f(x) equal to 0, and solve for x.
f(x) = (x² + 2x - 8)(x - 6)
(x² + 2x - 8)(x - 6) = 0   {set f(x) equal to 0}
(x + 4)(x - 2)(x - 6) = 0   {factored the quadratic trinomial into two binomials}
x + 4 = 0    or    x - 2 = 0    or    x - 6 = 0   {set each factor equal to 0}
x = -4    or    x = 2    or    x = 6   {solved each equation for x}

The zeros are (-4,0) , (2,0) , and (6,0)

A. , B., and D

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