Content deleted Content added
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\end{bmatrix}</math>
is lower triangular
:<math>\begin{bmatrix}
1 & 5 & 8 \\
2 & 96 & 9 \\
4 & 9 & 69
\end{bmatrix}</math>
, and
:<math>\begin{bmatrix}
Line 49 ⟶ 62:
\end{bmatrix}</math>
is upper triangular
:<math>\begin{bmatrix}
1 & 4 & 1 \\
99 & 6 & 9 \\
40 & 88 & 1
\end{bmatrix}</math>
==Forward and back substitution==
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