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

It outputs $|x|$, which is $-x$ if $x$ is negative.

$|x| = x$ when $x$ is non-negative.

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

Consider 2 cases for $2x - 3$.

Case 1: $2x - 3 \geq 0$.

$x = 4$ or $x = -1$ is a solution.

Case 2: $2x - 3 < 0$.

$x = 4$ or $x = -1$ are the correct solutions.

Always consider different cases based on signs.

Check each solution in the original equation.