lets start over with this problem:

n^2 - 9n + 9

how do you determine if this is a perfect square, and can you factor it?

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  1. I posted two answers below the two you got.

    n^2 - 9 n + 81/4 = (n-9/2)^2

    would be a perfect square

    n^2 - 6 n + 9 = (n-3)^2

    would be a perfect square

    You can not factor n^2 - 9 n + 9

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