Hello,

Ideally, Maths is a compulsory subject in any branch of Engineering.
The minimum eligibility criteria for studying engineering -
-Passed HSC or its equivalent examination with Physics and Mathematics as compulsory subjects along with one of the Chemistry or Biotechnology or Biology or Technical or Vocational subjects and obtained at least 50% marks (at least 45% marks, in case of Backward class categories and Persons with Disability candidates) in the above subjects taken together.

Hello,
To get an admission in any engineering College you have to passed in all subjects and maths is more important to passed.
So I suggest you to give re-exam for mathematics and get yourself passed in all subjects.
Try to obtain more marks as much as you can.

Hope it helps!