Students of class 9th Class, Matric part 1, SSC part 1 can download or view class notes in PDF format. Real and Complex Numbers - Unit 2 Exercise 2.1 Notes Class 9 Mathematics are prepared with hard work so please give your comment about our efforts. Islamiat, Islamic Studies class 9th Class, Matric part 1, SSC part 1 Unit 2 PDF class notes online for free. If you have any questions about the notes please give a comment or give suggestions.