Which of the following is true for the polynomial obtained by the simplification of (x + 1)(x + 3)?

It is a trinomial.

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The degree of the polynomial is 3.

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It is a binomial.

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None of these

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Solution

The correct option is A It is a trinomial.
$Given: (x + 1) (x + 3)$

$(x + 1) (x + 3) = x^{2} + 3 x + x + 3 = x^{2} + 4 x + 3$

$x^{2} + 4 x + 3 has three terms and it is a trinomial.$

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