Question

-81p^2+18pq-q^2

Answer 1

-(9p-q)^2

Answer 2

@estudier , it doesn't help anyone to just post the answer. (and it's against the code of conduct, but that's besides the point). Can you post / explain how you got that answer?

Answer 3

Feel free....

Answer 4

I don't understand how you got that, so I can't. I'm asking because I also don't understand what you did.

Answer 5

umm hello im the one that needs the help here..estudier do you mind explaining?

Answer 6

81p^2-18pq+q^2= (9P)^2-2(9p)q+q^2
=(9p-q)^2

Answer 7

Look, these are standard formulations for square numbers

(a+b)^2 = a^2 + b^2 + 2ab
(a-b)^2 = a^2 + b^2 -2ab

I simply recognized the equation as being a perfect square.

That's why I posted no explanation.

Answer 8

thanks everyone

Answer 9

ur welcome.

Answer 10

\(\Large \color{purple}{\rightarrow -81p^2 + 9pq + 9pq - q^2 }\)
\(\Large \color{purple}{\rightarrow -9p(9p - q) + q(9p - q) }\)
\(\Large \color{purple}{\rightarrow (-9p + q)(9p - q) }\)

Answer 11

@estudier Check it please.