Answer:
Step-by-step explanation:
To arrange the terms in descending order of the polynomial \(-2x + 9x^6 + 1 - 9x^2\), we look at the powers of \(x\) from highest to lowest:
\[ 9x^6 - 9x^2 - 2x + 1 \]
Therefore, in descending order, the polynomial \(-2x + 9x^6 + 1 - 9x^2\) is \( \boxed{9x^6 - 9x^2 - 2x + 1} \).