Respuesta :

\left[A \right] = \left[ \frac{ - \left( 5 - 3\,x - 2\,x^{2} - 2\,x^{3}\right) }{-1-x}\right][A]=[​−1−x​​−(5−3x−2x​2​​−2x​3​​)​​] I hope helping this answer