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Matrices & Determinants

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Question 1• 2021• NAT
The determinant of matrix A=[1111−1111−1−1111113]A=\begin{bmatrix}1&1&1&1\\-1&1&1&1\\-1&-1&1&1\\1&1&1&3\end{bmatrix} is ______.
Question 2• 2023• NAT
If A=(1235)A=\begin{pmatrix}1&2\\3&5\end{pmatrix}, the value of ∣A4+3A2−5A+6I∣\left|A^4+3A^2-5A+6I\right| is ___________.
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