Respuesta :

irspow
Upon a little bit of rearranging you have:

2pq-4p-5qr+10r  now factoring 1st and 2nd pair of terms...

2p(q+2)-5r(q+2)  which is equal to:

(2p-5r)(q+2)
Answer is (2p-5r) (q-2). 
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