Ofcourse you can,i am living example of this. I wasted not only my class 9th but class 10th too. Honestly speaking, i was very weak student in class 9th just because i dont use to study. Yes i dont used to study a single miniute in a day. Physics was nightmare to me. When teacher used to give us homework and then i used to copy the solution. In class 10th things was almost same but after november i decided to study because i dont wanna fail in board exam. So, i start mugging TERM 2 syllabus (yes,i am 2017 10th pass out) and passed 10th with 9 CGPA (school walo ki meharbani bhi thi)
From 11th i decided to work hard as much possible. Changed city,changed school,changed coaching and voila..
Physics was nightmare but i cracked NSEP in 12th.(this is my fav now)
Cracked KVPY SA and SX both
Cracked JEE (M+A)
Currently, I am undergrad. At IIIT H 😅