Question

efetue a multiplicacao (4-2i) (-1+2i)

Answer 1

so como resolvi passo a passo:
(4-2i)×(-1+2i)
4×(-1)=-4 4×2i=8i -2i×(-1)=2i -2i×2i=-4i^2
-4+8i+2i-4i^2
R=-4i^2+8i-4


se for pra fazer quacao do 2 grau tbm:

-4i^2+8i-4=0
i=-8×-raiz de 64-64/-8
i=-8+_0/-8
i'=-8+0/-8=1
i"=-8-0/-8=1
S={1}