Question

Simplify...Urgent pls
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Answer 1

-x^2 + 18x - 9.

Explanation:

(x + 3)^2 - 2(x - 3)^2

= x^2 + 6x + 9 - 2(x^2 - 6x + 9)

= x^2 + 6x + 9 - 2x^2 + 12x - 18

= -x^2 + 18x - 9.

Answer 2

Hey!
The answer is:
-x^2+18x-9