If roots is of the equation x4−12x3+cx2+dx+81=0 are positiveThe value of c isThe value of d is Root of the equation 2cx + d =0, is

c=(α+β)(γ+δ)+αβ+γδ =(3+3)(3+3)+3⋅3+3⋅3=36+18=54 ∵αβ(γ+δ)+γδ(α+β)=−d ∴ d=−{3⋅3⋅(3+3)+3⋅3⋅(3+3)}=−108Required root =−d2c=−(−108)2×54=1