
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
For the one-variable quadratic equation in $x$: $x^{2}+\left(2k-1\right)x+k^{2}=0$ with two distinct real roots $x_{1}$ and $x_{2}$, <br/>$(1)$ Find the range of real number $k$; <br/>$(2)$ If the two real roots $x_{1}$ and $x_{2}$ of the equation satisfy $x_{1}+x_{2}+x_{1}x_{2}-1=0$, find the value of $k$.

Present the answer in LaTex format: \boxed{Your answer}
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