Which of the following is a binomial?

x^{2} - 2 x - 1

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x + 1

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x^{3} + x + 1

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x^{2}

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Solution

The correct option is B $x + 1$
$A polynomial with two terms with a plus or minus sign in between is called a binomial.$

$Out of the given options, x + 1 has two terms joined with a plus sign, hence it is a binomial.$

$x^{2} - 2 x - 1 is a trinomial.$
$x^{3} + x + 1 is also a trinomial.$
$x^{2} is a monomial.$

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