Which of the following polynomials is a trinomial of degree 3?

x^{2} + 2 x + 3

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x^{3} + 4

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x^{3} + 5 x + 6

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x^{4} + x^{2} + 1

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Solution

The correct option is C $x^{3} + 5 x + 6$
$x^{2} + 2 x + 3$ is a trinomial of degree 2
$x^{3} + 4$ is a binomial of degree 3
$x^{3} + 5 x + 6$ is a trinomial of degree 3

$x^{4} + x^{2} + 1$ is a trinomial of degree 4

Hence $x^{3} + 5 x + 6$ is the required polynomial.

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Give an example of a polynomial, which is:

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