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(5+4i)+(4-2i)=0
We simplify the equation to the form, which is simple to understand
(5+4i)+(4-2i)=0
Remove unnecessary parentheses
5+4i+(4-2i)=0
Remove unnecessary parentheses
+5+4i+4-2i=0
We move all terms containing i to the left and all other terms to the right.
+4i-2i=0-5-4
We simplify left and right side of the equation.
+2i=-9
We divide both sides of the equation by 2 to get i.
i=-4.5
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