perform the indicated operation and write answer in standard form please

(3+9i)(3-9i)

• (3+9i)(3-9i)=9+27i
  -27i-81ipower2 so i power 2=-1 so -1*-81=81
  so +27i and 27i cacel
  and 9+81=90
• 9 years agoHelpfull: Yes(0) No(0)