Respuesta :
It is a perfect square...
n^2-3n-3n+9
n(n-3)-3(n-3)
(n-3)(n-3)
(n-3)^2
It is a perfect square (n-3)^2
n^2-3n-3n+9
n(n-3)-3(n-3)
(n-3)(n-3)
(n-3)^2
It is a perfect square (n-3)^2