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Mathematics
Mathematics
Problem
If
A
=
[
α
2
2
α
]
A = \begin{bmatrix} \alpha & 2 \\ 2 & \alpha \end{bmatrix}
A
=
[
α
2
2
α
]
and
∣
A
∣
3
=
125
|A|^3 = 125
∣
A
∣
3
=
125
,
α
\alpha
α
is equal to a. 2 b. 3 c.
±
5
\pm 5
±
5
d. 0
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