SOLUTION: For what values of x is the expression sqrt(4x-x^2) defined as a real number.

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Question 249427: For what values of x is the expression sqrt(4x-x^2) defined as a real number.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
sqrt(4x-x^2)
SQRT[X^2-4X]
SQRT[X(X-4)]
X=0 & X=4