Question

Sendo i a unidade imaginaria, a expressao 2+3i+(3+1)·(4-i) resulta em...?

Answer 1

2+3i+(3+1)·(4-i)

2+3i+ (4)·(4-i)
2 + 3i + 16 - 4i

18 - i
 

Answer 2

$\boxed{i^2=-1}$

$2+3i+(3+i)(4-i)\\\\ 2+3i+12-3i+4i+1\\\\ \boxed{4i+15}$