SOLUTION: Simplify (12+5i) - (9-2i).

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Question 529794: Simplify (12+5i) - (9-2i).
Found 2 solutions by solver91311, jim_thompson5910:
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Add the real parts to form the real part of the sum. Add the real coefficents of the imaginary parts to form the real coefficient of the imaginary part of the sum. Remember, the minus sign between the two complex numbers distributes across the 2nd complex number.

John

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Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

%2812%2B5i%29-%289-2i%29 Start with the given expression.


12%2B5i-9%2B2i Distribute the negative.


%2812-9%29%2B%285i%2B2i%29 Group like terms.


3%2B7i Combine like terms.


So %2812%2B5i%29-%289-2i%29=3%2B7i


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