Imaginary
A parent tucks in a frightened child, reassuring them that the solutions to x² + 1 = 0 aren't real, while a little i hides under the bed like a monster.
Use this cartoon
Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2016-12-06-imaginary/ (CC BY-NC 4.0)Transcript
Parent: "Hush, hush. Don't worry. Solutions to x² + 1 = 0 aren't real."