Question

(a-9)²= (3x-y)²= (7x+a)²= (3s+2в )(3a-2в )

Answer 1

Ответ:

1)а²-18а+81

2)9х²-6ху+у²

3)49х²+14ах+а²

4)9sb-6bs+6ab-4b²

Answer 2

It appears that you have provided several equations in the form of $(a-9)^2 = (3x-y)^2 = (7x+a)^2 = (3s+2в)(3a-2в)$. However, these equations are not related to each other, so I'm not sure what specific information or solution you are looking for.

If you have any particular questions about these equations or if you need help solving a specific part of any of these equations, please provide more context or clarify your question, and I'd be happy to assist you further.