   # The product of any two complex number is ......

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1.Is positive
2.Is negative
3.Is complex
4.cant be said posted Jan 14, 2015
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## 1 Answer

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( a+ ib)*(C + id) = (ac-bd) + i(ad +bc) since it has iota term we can't say it as positive or negative , so product is always a complex number , it can be either purely real ( ad=-bc ) or purely imaginay ( ac = bd ) or may be having both real and imaginary parts , so it will definately a complex number answer May 26, 2015

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