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11-10-2017
Mathematics

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Evaluate the expression ( 1 + 2 i ) − ( 1 − 4i ) (1+2i)-(1-4i) and write the result in the form a + b i a+bi.

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12-10-2017

( 1 + 2 i ) − ( 1 − 4i ) (1+2i)-(1-4i)
= -9+8i

-9+8i is the result written in a+bi form.

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