NCERT Miscellaneous Exercise Q2 - Complex Numbers and Quadratic Equations

Question: For any two complex numbers z₁ and z₂, prove Re(z₁z₂) = Re(z₁)Re(z₂) − Im(z₁)Im(z₂).

Answer: The identity holds for all complex z₁ and z₂.

Full step-by-step NCERT solution with diagrams on Something by Zero.