# Adding and Subtracting Complex Numbers

The addition or subtraction of complex numbers is done by adding and subtracting only real numbers among themselves and also only imaginary numbers among themselves.

**(a + b i) + (c + di) = (a + c) + (b + d)i **

**(a + b i) − (c + di) = (a − c) + (b − d)i **

(5 + 2 *i*) + ( − 8 + 3 *i*) − (4 − 2*i* ) =

= (5 − 8 − 4) + (2 + 3 + 2)*i* = −7 + 7*i*

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