(6+3i) x (4-1/2i) gimana yah??

(6 + 3i) × (4 - 1/2i)
= 24 - 6•1/2i + 12i - 3•1/2i^2
= 24 - 3i + 12i - 3/2i^2
= 24 + 9i - 3/2i^2
= -3/2i^2 + 9i +24
Catatan: ^ = pangkat