1.
Let f(x)=∣a−10axa−1ax2axa∣f(x) = \begin{vmatrix} a & -1 & 0 \\ ax & a & -1 \\ ax^2 & ax & a \end{vmatrix}, a∈Ra \in \mathbb{R}. Then the sum of the squares of all the values of aa for which 2f′(10)+f′(5)+100=02f'(10) + f'(5) + 100 = 0 is