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[" 6.Let "alpha" and "beta" be the roots...

[" 6.Let "alpha" and "beta" be the roots of the equation "x^(2)+x+1=0" ."],[" Then,for "y!=0" in "R" ,"],[[y+1,alpha,beta],[alpha,y+beta,1," is equal to "quad (2019" Main,"9" April "1)],[beta,1,y+alpha]],[[" (a) "y(y^(2)-1)," (b) "y(y^(2)-3)],[" (c) "y^(3)-1," (d) "y^(3)]]

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