A\(=\dfrac{2}{3x-2}\cdot4\left|x\right|\cdot\sqrt{2}\left|3x-2\right|\)
TH1: x>2/3
\(A=\dfrac{2}{3x-2}\cdot4x\cdot\sqrt{2}\cdot\left(3x-2\right)=8x\sqrt{2}\)
TH2: x<2/3
\(A=\dfrac{2}{3x-2}\cdot4\left|x\right|\cdot\left(-\sqrt{2}\right)\left(3x-2\right)=-8\left|x\right|\sqrt{2}\)