Problem : What is the sum and the difference of 3 + 2ı and -2 + 4ı?

(3 + 2ı) + (- 2 + 4ı) = 1 + 6ı. (3 + 2ı) - (- 2 + 4ı) = 5 + (- 2)ı.

Problem : What is ?

= ƒ = = = + ı.

Problem : What is ?

= - +

Problem : What complex number is equal to its complex conjugate?

Any real number is equal to its complex conjugate. a + 0ı = a - 0ı = a.