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Mathematics 11 Online
OpenStudy (anonymous):

[8.03] Factor completely: x2 − 4x + 9 (x − 1)(x − 9) (x − 3)(x − 3) (x + 3)(x − 3) Prime

OpenStudy (anonymous):

its prime

OpenStudy (anonymous):

You're looking for two numbers that multiply to give +9 and add to give -4. The only factors of 9 are 1, 3, -1, -3, -9 and 9. There is no combination of these values that will add to give -4, so it is prime.

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