Modulus Functions - Solving Equations (AQA A-Level Mathematics): Flashcards

Non-negative value of any real number

$|x|$

$x$ if $x \geq 0$; $-x$ if $x < 0$

Consider different cases based on definition

$x = 4$ or $x = -4$

Modulus removes any negative sign

$x = 4$

$x = -1$

$x = -4$

Validity of solutions in original equation and case conditions