Respuesta :

(-1+6i) + (5-2i) - (8i)
-1 + 6i +5 -2i - (8i)
-1 + 6i + 5 -2i =8i
4+6i-2i-8i
4+4i-8i
4-4i

4-4i is ur answer, i hope this helps u!
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