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Let a= e^(i(2pi)/(3)). Then the equation...

Let `a= e^(i(2pi)/(3))`. Then the equation whose roots are `a+a^(-2)" and "a^(2)+a^(-4)` is

A

`x^(2)-2x+4=0`

B

`x^(2)-x+1=0`

C

`x^(2)+x+4=0`

D

`x^(2)+2x+4=0`

Text Solution

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The correct Answer is:
D
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