thetrojantv
thetrojantv
25-02-2018
Mathematics
contestada
helppppppppppppppppppppppppppppppppppp
Respuesta :
Louli
Louli
25-02-2018
Answer:
-16 + 37i
Explanation:
Note that i^2 = -1
(4+7i)(3+4i) = 4*3 + 4*4i + 7i*3 + 7i*4i
= 12 + 16i + 21i + 28i^2
= 12 + 37i + 28(-1)
= 12 + 37i - 28
= -16 + 37i
Hope this helps :)
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