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

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