Q.

Let α,β be the roots of x2+x+1=0 then the equation whose roots are α229 and α1004 is

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a

x2+x+1=0

b

x2-x-1=0

c

x2-x+1=0

answer is D.

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Detailed Solution

Ifαandβareofx2+x+1=0thenx=1±142=1±i32α=ω,β=ω2α229+α1004=ω229+ω1004=ω+ω2=1α225.α1004=ω.ω2=ω31RequiredEquationisx2(α229+α1004)x+α229.α1004=0x2+x+1=0

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