Question

1. $x = 9$, $-x^{2}+2x$

Explanation:

Step1: Substitute x=9 into expression

$-(9)^2 + 2(9)$

Step2: Calculate squared term and product

$-81 + 18$

Step3: Compute final sum

$-81 + 18 = -63$

Answer:

$-63$