If A = [ ll & 2 2 & ] and | A ^3 |=125, then = __________ . - Vidyadip

Question

If $A =\left[\begin{array}{ll}\alpha & 2 \\ 2 & \alpha\end{array}\right]$ and $\left| A ^3\right|=125$, then $\alpha=$ __________ .

✓

Answer

$\pm 3$

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