Question

Which expression is a trinomial?

A. x+y-13
B. 4xyz
C. 4x^3
D. x^3-3x^2+7x+5

Answer 1

A.
`x+y-13`

Explanation:

We have to find the expression which is tri-nomial.

Trinomial: It is that expression which contains three terms.

A.
`x+y-13`

It contains three terms .Therefore, it is trinomial.

B.4xyz

It does not contains three terms .Therefore, it is false.

C.
`4x^3`

It does not contains three terms .Therefore, it is false.

D.
`x^3-3x^2+7x+5`

It contains four terms .Therefore, it is not trinomial.

Answer:A.
`x+y-13`

Answer 2

A. x+y-13

Explanation:

A trinomial is a polynomial with 3 terms. Here are comments on the answer choices:

A. 3 terms -- your answer

B. 1 term of degree 3

C. 1 term of degree 3

D. 4 terms of degrees ranging from 3 to 0.