How do you multiply #(3+2i)^2#?
Risposta:
You remember that #i^2=-1#
Spiegazione:
#(3+2i)^2=(3+2i)(3+2i)#
#9+6i+6i+4i^2#
#9+12i+4(-1)#
#9+12i-4=5+12i#
Cosa sarebbe #(3+2i)(3-2i)=??#
You remember that #i^2=-1#
#(3+2i)^2=(3+2i)(3+2i)#
#9+6i+6i+4i^2#
#9+12i+4(-1)#
#9+12i-4=5+12i#
Cosa sarebbe #(3+2i)(3-2i)=??#