a) 6x - 6y = 6(x - y)
b)x2 - x3 + x4 = x2(1 - x + x2)
c) 5x4 - 10x2 + 20x = x(5x3 - 10x + 20) = 5x(x3 - 2x + 4)
d)12x2y2 - 6x2y3 - 24xy = xy(12xy - 6xy2 - 24) = 3xy(4xy - 2xy2 - 8)
a) 6x - 6y = 6(x - y)
b)x2 - x3 + x4 = x2(1 - x + x2)
c) 5x4 - 10x2 + 20x = x(5x3 - 10x + 20) = 5x(x3 - 2x + 4)
d)12x2y2 - 6x2y3 - 24xy = xy(12xy - 6xy2 - 24) = 3xy(4xy - 2xy2 - 8)