Question

1) x^3-9x; 2) n^2+8n+16; 3) 125a^3-1; 4) a+b+a^2-b^2.​

Answer 1

1) 3x-9x=-6x
2)2n+8n+16=10n+16
3)375a-1
4)a+b+2a-2b=3a-b
Наверное

Answer 2

It seems like you've provided four different mathematical expressions. If you have specific questions or tasks related to these expressions, please let me know what you'd like to do with them, whether it's factoring, simplifying, solving equations, or something else. I'd be happy to help once I know what you need.