Complex Numbers and Quadratic Equations
No real number squares to a negative value, so equations like x squared plus one have nowhere to go. Chapter 4, Complex Numbers and Quadratic Equations, of the NCERT Mathematics textbook for Class 11 introduces the imaginary unit and the complex plane. You will add, subtract, multiply and divide complex numbers, find modulus and conjugate with their geometric meaning, plot numbers on the Argand plane, and solve quadratics whose discriminant is negative in this larger system.
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