Answer:
When [tex]x<2[/tex]
Step-by-step explanation:
When [tex]x[/tex] is smaller than [tex]2[/tex], the resulting value under the square root will become negative. Since it is impossible to take the root of a negative number, the expression is thus undefined, however, it can be represented with the imaginary number [tex]i[/tex] where [tex]i[/tex] = [tex]\sqrt{-1}[/tex].
Hope this helps :)
