9514 1404 393
Answer:
C. x ≥ 1
Step-by-step explanation:
The content of the radical must be non-negative in both cases. The square of x is already non-negative for any x.
15(x -1) ≥ 0
x -1 ≥ 0 . . . . divide by 15; next, add 1
x ≥ 1 . . . . . matches choice C
