2 Answers By Expert Tutors
Raymond B. answered • 05/04/21
Tutor
5
(2)
Math, microeconomics or criminal justice
(8-4i)(2+6i)
use FOIL, first terms, outside, inside, then last terms multiplied together
8(2) + 8(6i) - 4i(2) - 4i(6i) =
16 + 48i -8i - 24i^2 =
16 +40i - 24(-1) = (i^2 =-1)
16+24 +40i =
40 +40i
(8 - 4i)(2 + 6i) = 8(2) + 8(6i) - 4i(2) - 4i(6i) = 16 + 48i - 8i - 24i2
Remember that i is the square root of -1, so i2 = -1
16 + 48i - 8i -24(-1) = 40 + 40i
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Paul M.
05/03/21