a) The expression 2x3 - x2 + x has x as a common factor, so
2x3 -x2 + x = x(2x2 - x + 1).
(b) 2x2 + 4x has 2x as a common factor, so
2x2 + 4x = 2x(x + 2).
(c) 2x2y + xy2 - x2y2 has xy as a common factor, so
2x2y + xy2 - x2y2 = xy(2x + y - xy).
2x3 -x2 + x = x(2x2 - x + 1).
(b) 2x2 + 4x has 2x as a common factor, so
2x2 + 4x = 2x(x + 2).
(c) 2x2y + xy2 - x2y2 has xy as a common factor, so
2x2y + xy2 - x2y2 = xy(2x + y - xy).
