For this case we have the following expression: 5x3 + 40y6 Common factor 5: 5 (x3 + 8y6) Factoring the expression within the parenthesis we have: 5 ((x + 2y2) (x2 - 2xy2 + 4y4)) Answer: The factored expression is given by: 5 ((x + 2y2) (x2 - 2xy2 + 4y4))