Resposta :
12:4 = 3 e resto 0
i¹² = i¹ = i
31:4 = 7 e sobram 3
i³¹ = i³ = -i
z = 6i + 7i + (-i) - 180i
z = 13i - i - 180 i
z = 12i - 180i
z = -168 i
i¹² = i¹ = i
31:4 = 7 e sobram 3
i³¹ = i³ = -i
z = 6i + 7i + (-i) - 180i
z = 13i - i - 180 i
z = 12i - 180i
z = -168 i