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8-123.

Which of the following binomials could be a factor of $x^{3} − 9x^{2} + 19x + 5$ ? Explain your reasoning.

$x−2$

$x−5$

$x+3$

$x+2$

Answer:

Binomial (b) because $5$ is a factor of the last term, but $2$ and $3$ are not.

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