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factor please

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a) 
 
   2X^2 -7x + 6 =
 
    2X^2 - 4X - 3X +6=
 
     2X ( X -2) - 3 ( X -2) =
 
     ( 2X -3 ) ( X -2 ) 
 
   b)  100 - Y^2 = ( 10 + Y ) ( 10 - Y) 
 
    c ) 8 X^3 - 1 = ( 2X - 1) ( 4X^2 + 2X + 1)