1.
If A=x22x33x42x33x44x53x55x810x17=Ax3+Bx2+Cx+DA = \begin{vmatrix} x-2 & 2x-3 & 3x-4 \\ 2x-3 & 3x-4 & 4x-5 \\ 3x-5 & 5x-8 & 10x-17 \end{vmatrix} = Ax^3 + Bx^2 + Cx + D,
then B+CB + C is equal to: