if n square + 9n + 20 the product of two prime numbers for n bring some integer then find n square + 1
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n^2+9n+20=n^2+5n+4n+20 =n(n+5)+4(n+5) = (n+5)(n+4) n=-5 &n=-4 n^2+1=(-5)^2+1=26 & n^2+1=(-4)^2+1=17
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