Question

Identify the trinomial among the given expressions.

• A. $7x+8xy$
• B. $1+2x+3y$
• C. $3x+7xy+yx$
• D. $3x+2y$

Answer 1

The correct option is B

$1+2x+3y$

$7x+8xy$ has two unlike terms. So, it is a binomial.
$1+2x+3y$ has three unlike terms. So, it is a trinomial.

$3x+7xy+yx$ has three terms, but only two unlike terms($7xy$ and $yx$ are like terms). So, it is a binomial.

$3x+2y$ has two unlike terms. So, it is a binomial.

Hence, option B is correct.