A sequence of polynomials P_i(x) are defined as follows:
P_1(x) = 1
P_2(x) = 1
P_{n+2}(x) = (x+2)P_{n+1}(x) - P_n(x), n=1,2,\dots
Prove that for all n > 1, P_n(x)^2 + x is divisible by P_{n-1}(x)
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Math is evil...
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