Resposta :
[tex]a.c=(-4+3i)(4-3i)=-16+12i+12i-9(i^2)=-7+24i[/tex]
[tex]ac+b=-7+24i+5-6i=-2+18i[/tex]
[tex]ac+b=-7+24i+5-6i=-2+18i[/tex]
a = -4 + 31, b= 5 - 6i e c = 4 - 3i
ac + b.
( - 4 + 3i)( 4 - 3i ) + 5 - 6i
- 16 + 12i + 12i - 9i^2 + 5 - 6i
24i-6i -16 + 5 + 9
18i - 2
ac + b.
( - 4 + 3i)( 4 - 3i ) + 5 - 6i
- 16 + 12i + 12i - 9i^2 + 5 - 6i
24i-6i -16 + 5 + 9
18i - 2