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

The non-negative value

$|x|$

$-x$

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

Two cases

$x = 4$

$x = 4$ and $x = -1$

$x = -4$

It contradicts $x \geq 1$

Split into cases based on sign changes