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)=??