If open paren x plus 8 close paren is a factor of f of x , which of the following must be true?

By the Factor Theorem, if (x + 8) is a factor of f(x), then the value of x that makes the factor zero must be a root. Solving x + 8 = 0 gives x = −8, so f(−8) = 0. Therefore, the statement that f of negative 8 equals 0 must be true.

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