\(\begin{array}{l} B = \dfrac{{3\sqrt x - 6 - x - 2\sqrt x + 2x - 3\sqrt x + 6}}{{\left( {\sqrt x + 2} \right)\left( {\sqrt x - 2} \right)}}\\ = \dfrac{{x - 2\sqrt x }}{{\left( {\sqrt x + 2} \right)\left( {\sqrt x - 2} \right)}}\\ = \dfrac{{\sqrt x }}{{\sqrt x + 2}}\\ P = A.B = \dfrac{{\sqrt x - 5}}{{\sqrt x }}.\dfrac{{\sqrt x }}{{\sqrt x + 2}}\\ = \dfrac{{\sqrt x - 5}}{{\sqrt x + 2}}\\ \left| P \right| > P \Leftrightarrow \left[ \begin{array}{l} P > P\left( {KTM} \right)\\ P < - P \end{array} \right.\\ \to 2P < 0\\ \to P < 0 \to \dfrac{{\sqrt x - 5}}{{\sqrt x + 2}} < 0\\ \to \sqrt x - 5 < 0\\ \to 0 < x < 25;x \ne 4 \end{array}\)
