1.
The determinant ∣1(x−3)(x−3)21(x−4)(x−4)21(x−5)(x−5)2∣\begin{vmatrix} 1 & (x-3) & (x-3)^2 \\ 1 & (x-4) & (x-4)^2 \\ 1 & (x-5) & (x-5)^2 \end{vmatrix} has