NCERT Solutions for Class 11 Maths Chapter 5 Complex Numbers and Quadratic Equations सम्मिश्र संख्याएँ और द्विघात समीकरण download in PDF form free to use it offline. All Solutions are updated for CBSE Exam 2019 based on new **CBSE Curriculum 2018-19** for CBSE Board, UP Board, Uttarakhand Board and Bihar Board, who are following **NCERT Books** for their exams.

## NCERT Solutions for Class 11 Maths Chapter 5

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### Class 11 Maths Chapter 5 Complex Numbers Solutions

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#### Important Terms on Complex Numbers

- A number of the form z = a + ib, where a, b are real numbers, is called a complex number. a is called the real part of z, denoted by Re(z) and b is called the imaginary part of z, denoted by Im(z).
- a + ib = c + id if a = c, and b = d
- If z1 = a + ib, z2 = c + id. In general, we cannot compare and say that z1> z2 or z1< z2 but if b, d = 0 and a > c then z1> z2, i.e. we can compare two complex numbers only if they are purely real.
- z = 0 + i 0 is
*additive identity*of a complex number. - –z = –a –ib is called the
*Additive Inverse*or negative of z = a + ib. - z = 1 + i 0 is
*multiplicative identity*of complex number.

- z = 0 + i 0 is
- The coordinate plane that represents the complex numbers is called the complex plane or the Argand plane.

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