Math with Bad DrawingsCartoon Archive

Every Equation a Story

June 26, 2018

A student asks what story their equation tells; the equation is the classic mistake √(a+b) = √a + √b.

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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/2018-06-26-every-equation-a-story/ (CC BY-NC 4.0)
Transcript

A: "You know, every equation tells a story." B: "Cool! What story does mine tell?" [Board: √(a+b) = √a + √b]

A: "Well... your equation may have a few plot holes." B: "My math teacher always said I was an unreliable narrator."

Topics
Algebra › RadicalsAlgebra › Properties of OperationsNumber & Arithmetic › Squares & Square Roots
Level
Middle SchoolHigh School
Themes
Common MistakesLiterature & MythTeachers & Classroom