Mathematics · 2013
JEE Main · 9 April 2013, Shift 1 · Q84
The matrix A^2+4 A -5 I, where I is identity matrix and A = [1, 2; 4, -3], equals:
The matrix $\displaystyle \mathrm{A}^2+4 \mathrm{~A}-5 \mathrm{I}$, where I is identity
matrix and $\displaystyle \mathrm{A}=\left[\begin{array}{cc}1 & 2 \\ 4 & -3\end{array}\right]$, equals :
Official answer
(1)
$\displaystyle 4\left[\begin{array}{ll}
2 & 1 \\
2 & 0
\end{array}\right]$
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JEE Main 2013 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.