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Preform the indicated operation. Write your answer in proper a + bi form.
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(4 +√-6) + (8-√-294) -(21 + √-216)



Answer :

konrad509
[tex](4 +\sqrt{-6}) + (8-\sqrt{-294}) -(21 + \sqrt{-216})=\\ 4+\sqrt6i+8-7\sqrt6i-21-6\sqrt6i=\\ -9-12\sqrt6i [/tex]

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