If a + ib = c + id, then

Complex Numbers and Quadratic Equations, covered in Chapter 4 of the NCERT Class 11th Maths book, begins by introducing complex numbers. These numbers include real and imaginary parts and have operations such as addition, subtraction, multiplication, and division. The chapter also explores the geometric representation of complex numbers along with modulus and argument. Moving on to quadratic equations, the focus is on solving them through methods like factoring, completing the square, and the quadratic formula. The chapter wraps up with an explanation of the nature of roots and discriminants, providing a deeper understanding of quadratic equations and their solutions.