Mathematics, 18.09.2019 04:30, tthompson7186

Which expression is prime? a) x2 - 9 b) 1 - 9x2 c) 2a2 - 25 d) 4x2 - 9

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Which expression is prime? a) x2 - 9 b) 1 - 9x2 c) 2a2 - 25 d) 4x2 - 9...