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Simplify the following expression. (10-4i)(4-5i)+(-15+20i)

 Aug 9, 2020
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Expand the L side

40 - 50 i - 16i + 20 i^2         + -15 + 20 i\

20 -66i               - 15 + 20i

5 - 46i

 Aug 9, 2020

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