Question

Classify the expression 7x3 + 2x2 − 9x as a monomial, binomial, trinomial, or polynomial.

I say trinomial, but I just want a second opinion. Thank you!

Answer 1

You are correct trinomial.

Answer 2

Trinomial

Explanation:

Classify the expression 7x3 + 2x2 − 9x as a monomial, binomial, trinomial, or polynomial.

`7x^3 + 2x^2 - 9x`

An expression with an single term is a monomial , for example 3x^2

An expression with two terms is a binomial, for example 2x+5 has two terms 2x and 5

An expression with three terms is a trinomial . Our given expression has three terms
`7x^3, 2x^2 \ and \  -9x`

So it is a trinomial.