Relax

Respuesta :

Hi1315

Answer:

[tex] ({k}^{2} + 3) \times( {k}^{2} + 7) \\ = {k}^{4} + 7 {k}^{2} + 3 {k}^{2} + 21 \\ = {k}^{4} + 10 {k}^{2} + 21[/tex]