Question

_{^{\(x\sqrt{18}-\sqrt{18}=x\sqrt{18}+4\sqrt{2}\)}}       

Answer 1

\(x\sqrt{18}-\sqrt{18}=x\sqrt{18}+4\sqrt{2}\\ \Rightarrow-3\sqrt{2}=4\sqrt{2}\left(vô.lí\right)\)

Answer 2

\(x\sqrt{18}-\sqrt{18}=x\sqrt{18}+4\sqrt{2}.\)

\(\Leftrightarrow x\sqrt{18}-\sqrt{18}-x\sqrt{18}=4\sqrt{2}.\)

\(\Leftrightarrow-3\sqrt{2}=4\sqrt{2}\) (vô lý).

Answer 3

 

<=> x\(\sqrt{18}\) - x\(\sqrt{18}\) = \(4\sqrt{2}\) + \(\sqrt{18}\)

<=> 0x = \(4\sqrt{2}\) + \(3\sqrt{2}\)

<=>0x = \(7\sqrt{2}\)