Answer:
[tex]2x^3-7y^3 +14[/tex]
Step-by-step 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
[tex]2x-7[/tex] has two terms 2x and -7. So it is not a trinomial
[tex]2x^3-7y^3 +14[/tex] has three terms 2x^3, -7y^3 and +14. So it is a trinomial.
[tex]2y^2+7y[/tex] has two terms, So it is not a trinomial
