SOLUTION: For what values of x is the value of each expression a real number? 1. square root of x 2. 5-square root of x 3. square root of x+3

Algebra ->  Real-numbers -> SOLUTION: For what values of x is the value of each expression a real number? 1. square root of x 2. 5-square root of x 3. square root of x+3      Log On


   

Question 153822: For what values of x is the value of each expression a real number?
1. square root of x
2. 5-square root of x
3. square root of x+3
Answer by orca(409) About Me  (Show Source):
You can put this solution on YOUR website!
1)
For sqrt%28x%29 to be a real number, x has to be greater or equal to 0.
2)
For 5+-+sqrt%28x%29 to be a real number, x has to be greater or equal to 0.
3)
For sqrt%28x%2B3%29 to be a real number, x+3 has to be greater or equal to 0.
I.e., x+3 >=0
Solving the inequality for x, we have
x>=-3