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⋅ 3.1416/3≐2.0944 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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