Another way of looking at it.
2 X^{2} +13X 7
If this is factorable then
there should be 2 integers whose difference is +13, and product  14, they are +14, 1
2X^{2} + 14X  X  7 =2X ( X +7)  ( X + 7 ) = ( 2X  1 ) ( X + 7)
* ( factoring by group )
11/25/2013

Parviz F.
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