Question

Determine os valores de a e b sabendo que a − 1 + bi = (3 + i)(1 + 3i)​

Answer 1

$a-1+bi = 3+9i+i+3i^2 \\~\\ a-1+bi = 3+9i+i-3 \\~\\(a-1)+bi = 0+10i$

$a-1 = 0 \\~\\\\a = 1$

$b = 10$