ea n – InterviewSolution

1.	ea n
Answer» x1^3+4x1-80=0compare it with ax^2+bx+c=0so D=root(b^2-4ac)=root(16+320)=root(336)= 4root(21)x1=(-b+root(D))/2a=(-4+4root(21))/2=-2+2root(21)orx1=(-b-root(D))/2a=(-4-4root(21))/2=-2-2*root(21)

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