arinkim007
arinkim007
20-03-2018
Mathematics
contestada
Help for number 5 please
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backseatdog
backseatdog
20-03-2018
6i^4 = 6*1 = 6
6i^3 = 6*(-i) = -6i
-2i^2 = (-2)*(-1) = 2
sqrt(-49) = 7i
So, we have: 6 - 6i + 2 + 7i = 8 + i
The answer is D
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