1,2
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Find the real roots of
\[x^4 - 2x^3 - x + 2 = 0.\]
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
1,2
Find the real roots of
\[x^4 - 2x^3 - x + 2 = 0.\]
train