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Let P(x) = x^10+ a2x^8 + a3 x^6+ a4 x^4 ...

Let `P(x) = x^10+ a_2x^8 + a_3 x^6+ a_4 x^4 + a_5x^2` be a polynomial with real coefficients. If `P(1)=1 and P(2)=-5`, then the minimum-number of distinct real zeroes of `P(x)` is

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