Which among the following is a cubic polynomial?

x^{2} + 5 x - 14

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

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3 x^{2} - 4 x

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3 x - 4

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Solution

The correct option is B $x^{3} - 4 x^{2}$
A cubic polynomial is a polynomial with degree 3. In the given options, only $x^{3} - 4 x^{2}$ has a degree 3. Hence, that is the cubic polynomial.

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Similar questions

Which of the following is a polynomial ?

(a) $x^{2} - 5 x + 4 \sqrt{x} + 3$ (b) $x^{\frac{3}{2}} - x + x^{\frac{1}{2}} + 1$

Which of the following is a quadratic polynomial ?
(a) $x + 4$
(b) $x^{3} + x$
(c) $x^{3} + 2 x + 6$
(d) $x^{2} + 5 x + 4$

\frac{x^{2} - 7 x + 10}{x^{2} - 5 x - 14} \times \frac{x^{3} + 8}{x^{3} - 8} \times \frac{x^{2} + 2 x + 4}{x^{2} - 2 x + 4} \times \frac{x - 7}{x - 5} = ?

x^{3} - 5 x + 4

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