Find the real roots of
\[x^4 - 2x^3 - x + 2 = 0.\]
Question:
Find the real roots of
\[x^4 - 2x^3 - x + 2 = 0.\]
Answer:
Let's think step by step.

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