1.
The determinant 1(x3)(x3)21(x4)(x4)21(x5)(x5)2\begin{vmatrix} 1 & (x-3) & (x-3)^2 \\ 1 & (x-4) & (x-4)^2 \\ 1 & (x-5) & (x-5)^2 \end{vmatrix} has