JEE Main 2022 · 26 Jul · Shift 2, Mathematics question 3

Let $A=\begin{bmatrix}1\\1\\1\end{bmatrix}$ and $B=\begin{bmatrix}9^2&-10^2&11^2\\12^2&13^2&-14^2\\-15^2&16^2&17^2\end{bmatrix}$, then the value of $A'BA$ is: