Question 57996: multiply and simplify (5+4i)(3-7i)
15-35i+12i+28
43-23i Found 2 solutions by rcmcc, jaya_rohith1@yahoo.com:Answer by rcmcc(152) (Show Source):
You can put this solution on YOUR website! using the foil method multiply out the question the first of term a to the two terms in b, and the second term in a by the 2 terms in b.
so you get
(5)(3)+(5)(-7i)+(4i)(3)+(4i)(7i)
or
15-35i+12i+28i^2
combine like terms
28i^2-(23i)+15
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