Réponses

  • Utilisateur Brainly
2014-01-19T22:35:09+01:00
(-4-i)z+3-5i = 0 
(-4-i)z = -3+5i 
z= -3+5i/-4-i 
z= (-3+5i)(-4+i)/(-4-i)(-4+i) 
z= 12-3i-20i+5i²/16-i² 
z= 12-23i-5/17 
z= 12-23i/17 
z= 
(7-23i)/17=(7/17)-i(23/17)