Khi m= \(1-2\sqrt{2}\) ta có bất phương trình
\(3\left(1-2\sqrt{2}-1\right)+1>2\left(1-2\sqrt{2}\right)+x\left(1-2\sqrt{2}\right)\)
\(\Leftrightarrow-6\sqrt{2}+1>\left(x+2\right)\left(1-2\sqrt{2}\right)\)
\(\Leftrightarrow x+2< \frac{-6\sqrt{2}+1}{1-2\sqrt{2}}\)
\(\Leftrightarrow x< \frac{-6\sqrt{2}+1-2-4\sqrt{2}}{1-2\sqrt{2}}=\frac{-10\sqrt{2}-1}{1-2\sqrt{2}}\)\(\sim8,2815\)