Mathematics, 02.09.2019 08:50 lusciousl

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

Answers: 1

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You know the right answer?

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