Digital ACT Math Practice Question #2108
Test your problem-solving accuracy on this official-caliber item. Select an answer choice to check your reasoning instantly.
Test $x = -2$ into choices. $(-2)^3 + 3(-2)^2 - 4 = -8 + 12 - 4 = 0$. Done.
By the Factor Theorem, $(x + 2)$ is a factor of $f(x)$ if and only if $f(-2) = 0$. For choice A: $(-2)^3 + 3(-2)^2 - 4 = -8 + 3(4) - 4 = -8 + 12 - 4 = 0$. Thus $(x + 2)$ is a factor....
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