Respostas

2014-04-14T17:09:07-03:00
A) 2x + (x - 3)i = 12 + 3i 
2x + xi - 3i = 12 + 3i 
x(2+i) = 12 + 6i 
x = (12+6i)/(2+i) 
x = 6+6i