Answer:
Explanation:
Trinomial is a expression that has 3 terms. Now we check the options that has 3 terms.Terms are separated by operators like +,- , x or \
5xy has only one term
has two terms 2x and -7. So it is not a trinomial
has three terms 2x^3, -7y^3 and +14. So it is a trinomial.
has two terms, So it is not a trinomial