Explicație pas cu pas:
[tex] |x - 4| \cdot ( |x - 2| - 3) < 0[/tex]
[tex]|x - 4| \geqslant 0, \: Vx \in \mathbb{R} \implies |x - 2| - 3 < 0 \\[/tex]
[tex]|x - 2| - 3 < 0 \iff |x - 2| < 3 \\ - 3 < x - 2 < 3 \\ - 3 + 2 < x < 3 + 2 \\ - 1 < x < 5 \iff x \in (- 1;5)[/tex]
