Explicación paso a paso:
[tex](9 {a}^{3} - {a}^{2} b {)}^{2} [/tex]
[tex] = 81 {a}^{6} - 18 {a}^{5} b + {a}^{4} {b}^{2} [/tex]
[tex](6m {n}^{4} + 3 {m}^{5} p {)}^{2} [/tex]
[tex] = 36 {m}^{2} {n}^{8} + 36 {m}^{6} {n}^{4} p + 9 {m}^{10} {p}^{2} [/tex]
