Answer:
-5+2i
Step-by-step explanation:
x = 3 + 5i , y = - 2 + 7i
y - x = - 2 + 7i - (3 + 5i)
= -2 + 7i - 3 - 5i
Collect like terms
-2 -3 + 7i - 5i
-5 + 2i
Therefore y-x = -5 + 2i
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