Let the two complex numbers z

So, z

= (a

Similarly for subtraction

z

= 3 + 4 + 7i + 5i

= 7 + 12 i

= 13 – i + 3 – 2i

= 16 – 3i

The multiplication of complex numbers is same as the product of two binomial. Here you can use a FOIL method.

z

= a

= a

= 10

= 10 + 7i + 12 ( i

= 22 + 7i

Solution :We have ,

i

= 1 + i – 1 – i

= 0

In division always multiply the numerator and denominator by conjugates of denominator.

From operations with complex numbers to Home page

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