I already posted this question,Steve answered it. I just wanted to clarify my answer.

Problem:Find h(x) with terms in order of decreasing degree,
if 9x^3-3x+1+h(x)=3x^2-5x+3.

Steve: h(x) = (3x^2-5x+3)-(9x^3-3x+1)

so, just subtract tghe coefficients of like powers.

My answer:−9x^3+3x^2−2x+2 so the answer would be −9x^3,3x^2,−2x right?

3 answers

h(x) = −9x^3+3x^2−2x+2

why did you put commas between terms in your answer ?
Because it is asking for the terms in order of decreasing degree.
in h(x) = −9x^3+3x^2−2x+2

they are in order of decreasing degree