Which among the following is a cubic polynomial?

$x^{2} + 5 x - 14$

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$3 x - 4$

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$3 x^{2} - 4 x$

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$x^{3} - 4 x^{2}$

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Solution

The correct option is D
$x^{3} - 4 x^{2}$

A cubic polynomial is a polynomial of degree 3.
Here, only $x^{3} - 4 x^{2}$ has the degree 3.
Hence, $x^{3} - 4 x^{2}$ is the only cubic polynomial among the given options.

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