Respuesta:
[tex]-18x^6+73x^4+144x^2+5917[/tex]
Explicación paso a paso:
[tex]\left(x+3\right)\left(x-3\right)\left(x^2-9\right)\left(x^4-8\right)-\left(x^8-6565\right)\\\\\left(x+3\right)\left(x-3\right)\left(x^2-9\right)\left(x^4-8\right)-x^8+6565\\\\x^8-18x^6+73x^4+144x^2-648-x^8+6565\\\\x^8-x^8-18x^6+73x^4+144x^2-648+6565\\\\-18x^6+73x^4+144x^2-648+6565\\\\-18x^6+73x^4+144x^2+5917[/tex]
