bianca0668 bianca0668

22-01-2021
Mathematics

contestada

Which expression is equivalent to (7 + 2i)(-3 - 4i)?
A 13+34i
B -13 - 34i
C -29 - 34i
D 29 + 34i

Respuesta :

manlo31 manlo31

22-01-2021

B -13 -34i

(7 + 2i)(-3 - 4i)
Take the 7 then times it buy the second bracket 7x(-3-4i) then take 2i from the first bracket and times it with the second bracket 2ix (-3-4i)

Then keep simplifying

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