Which of the following is a binomial?

$2 x + 7$

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$4 x + y + 2$

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$7 y - 3 x + 4$

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$3 x$

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Solution

The correct option is A
$2 x + 7$

An algebraic expression, which contains only two unlike terms is called a binomial.

Among the given options, 2x + 7 has two unlike terms. So it is a binomial.
$3 x$ has only one term and hence, a monomial.
$4 x + y + 2$ and $7 y - 3 x + 4$ have three terms each, hence are trinomials.

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