Find the sum of all real numbers $x$ such that $5x^4-10x^3+10x^2-5x-11=0$.
Question:
Find the sum of all real numbers $x$ such that $5x^4-10x^3+10x^2-5x-11=0$.
Answer:
Let's think step by step.

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Find the sum of all real numbers $x$ such that $5x^4-10x^3+10x^2-5x-11=0$.
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