SOLUTION: for which values of the variable does the expression make sense? √2x-4

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Question 1201049: for which values of the variable does the expression make sense?
√2x-4
Answer by ikleyn(52817) About Me  (Show Source):
You can put this solution on YOUR website!
.

If your expression is  sqrt%282x-4%29,  then the necessary condition for the expression
to be defined over the real numbers is this inequality

    2x - 4 >= 0,


saying that the radicand is non-negative.


From this inequality, you have  

    2x >= 4  and further  x >= 2.


It is the ANSWER.

Solved.