Respuesta :
Respuesta:
[tex](3a - 7 {b}^{2} )(a + x)[/tex]
Explicación:
[tex]3 {a}^{2} - 7 {b}^{2} x + 3ax - 7a {b}^{2} [/tex]
[tex](3 {a}^{2} - 7a {b}^{2} ) + (3ax - 7 {b}^{2} x)[/tex]
[tex]a(3a - 7 {b}^{2} ) + x(3a - 7 {b}^{2} )[/tex]
[tex](3a- 7 {b}^{2} )(a + x)[/tex]