SOLUTION: find the reciprocal and simplify (2-i)

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Question 676776: find the reciprocal and simplify (2-i)
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
reciprocal is
1%2F%282-i%29
...
Simplify
%281%2F%282-i%29%29%28%282%2Bi%29%2F%282%2Bi%29%29
%282%2Bi%29%2F%28%282-i%29%282%2Bi%29%29
denominator
(2-i)(2+i) = 4 - i^2
i^2 = sqrt%28-1%29%5E2+=+-1
so, 4 - -1 = 5
...
highlight_green%28%28%282%2Bi%29%29%2F5%29
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