Which polynomial is a quadratic trinomial?

The largest exponent here is 4, so that makes it a quartic.
There are 3 terms, so we have a trinomial. Each term is separated by either a plus or a minus.
Choice A shows a quartic polynomial. Choice B is a cubic polynomial. Choice d is a quadratic trinomial.
Answer:
2x^2−4x+6
Step-by-step explanation:
Well, its a trinomial, so it can only have 3 terms, which limits us down to the last two. Its also a quadratic trinomial and since x^2 means squared and squares have 4 sides we can guess that the answer is D. 2x^2-4x+6