[tex]\begin{gathered} \sqrt[]{x+3}=x-3 \\ \end{gathered}[/tex][tex]\begin{gathered} \text{ Squaring both sides we have} \\ x+3=(x-3)^2 \end{gathered}[/tex][tex]\begin{gathered} \text{ therefore} \\ x+3=x^2-3x-3x+9=x^2-6x+9 \end{gathered}[/tex][tex]undefined[/tex]
