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[tex] x^{3} [/tex] + 6[tex] x^{3} [/tex] = 4[tex] x^{3} [/tex];
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[tex] x^{3} [/tex] - 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!
