Hey there.
When writing a polynomial in standard form, you always want to start from the highest degree (exponent), so let's simplify our expression before doing so.
-2
+ 6
= 4
;
This number will go first as it has the highest degree.
Up next will be '-3x', as it has a degree of 1.
After this, we have 6, having a degree of 0.
Let's set up our new polynomial with this information;
4
- 3x + 6.
This is known as a
cubic trinomial since it has three terms and has a degree of 3.
Your correct answer is
"D.)"
I hope this helps!