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456

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(5+6i) (-2+3I

Guest Feb 25, 2016

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(5+6i) (-2+3i ) =

5 * -2 + 5 *3 i - 2*6i + 18i^2 = [ remember, i^2 = -1 ]

-10 + 15i - 12i - 18 =

-28 + 3i

CPhill Feb 25, 2016

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