I saw an interesting while browsing the internet. Is there any expert that may explain the way to solve questions like this?
2026-03-27 16:46:30.1774629990
Unknown in Gaussian Eliminations
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Hint:
I would consider two cases:
Case $1$: $x_1 \neq 0$. what can you conclude since it is in RREF form.
Case $2$. $x_1 = 0$. I will further consider two cases, $x_2=0$ and $x_2 \neq 0$.
Overall idea is to consider cases and make conclusion from the RREF.