Question

помогите пожалуйста!!!!!

Answer 1

$- 280 {x}^{3}y - 18x {y}^{2} = - 2xy(140 {x}^{2} + 9y) \\ - 3 {a}^{2} + 10a - 18 \\ 3 {a}^{2} b - 3a {b}^{2} - 3 {a}^{3} = 3a(ab - b^{2} - {a}^{2} )$