Which of the above polynomials is a 5th degree trinomial?

A. 3 - 7x^5 + x^2

B. 5x^3 + 5 - 3x

C. 3x + 2x^3 - x^2 + 6 + 2x

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

Easy

5th degree means highest power is 5 so must have x^5

trinomial means 3 terms

A. trinomial, highes power is 5, check

b. trinomial, highest power is 3, nope

c. not a trinomial, highest power is 3, nope

d. not a trinoial, highest power is 5, nope

answer is A