Complex square roots

Determine the sum of the three square roots of 343.

Final Answer:

x =  0

Step-by-step explanation:

α=2π/3=2 3.1416/32.0944 rad  x1=3343 cos(0 α)=3343 cos(0 2.0944)=7 x2=x1 cos(α)=7 cos(2.0944)=27=321=3.5 x3=x1 cos(2 α)=7 cos(2 2.0944)=27=321=3.5 x=x1+x2+x3=7+(3.5)+(3.5)=0



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You need to know the following knowledge to solve this word math problem:

arithmeticplanimetricsnumbersgoniometry and trigonometryUnits of physical quantitiesGrade of the word problem

 
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