Respuesta :

This expression is a trinomial. 

Trinomial means that there is 3 monomials.

1st monomial = 9x^4
2nd monomial = -3x
3rd monomial = 4

Therefore, Trinomial is your answer

hope this helps

Answer:

Fourth-degree trinomial  

Step-by-step explanation:

9x^4 – 3x + 4 is a trinomial expression because it has three parts: 9x^4, –3x and 4, and is a fourth-degree expression because four is the highest exponent applied to the variable x (the other exponents are one and zero).