If p, q, r are the roots of the equation...

If `p, q, r` are the roots of the equation `x^3 -3x^2 + 3x = 0` , then the value of `|[qr-p^2, r^2 , q^2],[r^2,pr-q^2,p^2],[q^2,p^2,pq-r^2]|`=

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