kenzieann7672 kenzieann7672

08-10-2017
Mathematics

contestada

Prove or disprove: if p and q are prime numbers then pq - 2 is also a prime number.

Respuesta :

konrad509 konrad509

30-07-2018

Counterexample:

[tex] p=2\\
q=3\\\\
pq-2=2\cdot3-2=4 [/tex]

4 is not a prime number. So, it's false.

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