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Problems
If
A
=
(
2
x
1
3
)
,
B
=
(
3
−
x
−
1
2
)
A=\begin{pmatrix}2 & x\\ 1 & 3\end{pmatrix},\quad B=\begin{pmatrix}3 & -x\\ -1 & 2\end{pmatrix}
A
=
(
2
1
x
3
)
,
B
=
(
3
−
1
−
x
2
)
…
Mathematics
Problem
If
A
=
(
2
x
1
3
)
,
B
=
(
3
−
x
−
1
2
)
A=\begin{pmatrix}2 & x\\ 1 & 3\end{pmatrix},\quad B=\begin{pmatrix}3 & -x\\ -1 & 2\end{pmatrix}
A
=
(
2
1
x
3
)
,
B
=
(
3
−
1
−
x
2
)
and
A
B
=
I
2
AB=I_2
A
B
=
I
2
, determine the value of
x
x
x
.
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