Question

ayúdamen prof

nose éso no me sale ​

Answer 1

$9 {a}^{2} - 12ab + 15 {a}^{2} {b}^{2} - 24 {ab}^{3} = \\ \bf \: = 3a(3a - 4b + 5a {b}^{2} - 8 {b}^{3} )$