Respuesta :

Answer: A

Step-by-step explanation:

[tex]9(2x-3)^2 + 7=448\\\\9(2x-3)^2 = 441\\\\(2x-3)^2 = 49\\\\2x-3 = \pm 7\\\\2x=3 \pm 7\\\\x=\frac{3}{2} \pm \frac{7}{2}=\boxed{-2, 5}[/tex]