Respuesta :
Recall that i represents the square root of -1, so by squaring it we get -1.
(2 + 4i)(7 - 3i)
= 14 - 6i + 28i + 12
= 26 + 22i
(2 + 4i)(7 - 3i)
= 14 - 6i + 28i + 12
= 26 + 22i