Simplify each of the following and express it in the form a + ib

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Question:
Simplify each of the following and express it in the form a + ib :

$(8-4 i)-(-3+5 i)$

Solution:

Given: $(8-4 i)-(-3+5 i)$

Firstly, we open the brackets

$8-4 i+3-5 i$

$=11-9 i$