Factorize the following:
Greatest common factor of the two terms namely 2x3y2, - 4x2y3, - 8xy4 of expression 2x3y2 - 4x2y3 - 8xy4 is 2xy2
2x3y2 - 4x2y3 - 8xy4 = 2xy2 (x2 - 2xy + 4y)