[tex]9\\\\(9)(-3)=-27\\\\(-27)(-3)=81\\\\(81)(-3)=-243\\\\(-243)(-3)=729\\\\(729)(-3)=-2,187\\\\Answer:\ \boxed{729\ and\ -2,187}[/tex]
Other method:
[tex](-3)^2=9\\(-3)^3=-27\\(-3)^4=81\\(-3)^5=-243\\(-3)^6=729\\(-3)^7=-2187[/tex]
