algebra 2
posted by brooke .
What is the smallest value of x for which the radical expression (radical sign)2x10 is a real number

Usually, the radical sign defaults to mean the squres root. So, the question is for what values of x is the square root of (2x10) a real number. The square root is real for all nonnegative values. So, for what values of x will (2x10) be nonnegative? What is the smallest value?