College Algebra - Part 15 (Complex Numbers)

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Multiplying complex numbers and complex conjugates.
Simplify:
(3 - i )(5 - 4i)
(a + bi)(a - bi)
(7 - 5i)(7 + 5i)
(9 + 10i)(9 - 10i)
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I agree with Anthony, you have made math somewhat fun. For some reason my professor makes it torture. Thank you!

cain
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You are so amazing! You make me love math

anthonysmith