first of all it is a very lengthy chapter so you have study it sequence wise

1. read and attempt all qes. of NCERT

2. read some basic geomtry(proprties of triangle , circle etc. both co rdinate and eucilden)

now start with M.L. KHANNA

and move on to ARIHANT MATHS (SUGGESTED BOOK)

DONT USE ARIHANTH MATHS. ITS VERY BAD FOR ALL KINDS OF ALGEBRA. SOME SUMS ARE STUPID, AND SOME ARE GOOD FOR RMO. I CLEARED RMO USING THAT BOOK BUT ITS WASTE FOR IIT.