Bjones2019J Bjones2019J

10-01-2017
Mathematics

contestada

What is the standard form for the expression (5+2i)(5-9i)

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ILiketothinkimsmart ILiketothinkimsmart

10-01-2017

FOIL multiply "first" then "outside" then "inside" then "last"

5*5+(-9i)*5+2i*5+2i*(-9i)
25-45i+10i+18
43+35i

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