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Mathematics 15 Online
OpenStudy (anonymous):

Factor completely: x2 − 3x + 7 Prime (x + 7)(x − 1) (x − 7)(x − 1) (x + 7)(x + 1)

jimthompson5910 (jim_thompson5910):

x2 − 3x + 7 is prime since there are no two rational numbers that both multiply to 7 AND add to -3

OpenStudy (anonymous):

use the quadratic formula

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