Solve the Problem $f ( x ) = \sqrt { x ^ { 2 } - 9 x + 45 } - 1$

question 36

Multiple Choice

Solve the problem.
-For the function $f ( x ) = \sqrt { x ^ { 2 } - 9 x + 45 } - 1$ , find all values $x$ for which $f ( x ) = 4$ .

• A) \(\{ 5,4 \}\)
• B) \(\{ 5 , - 4 \}\)
• C) \(\{ - 5 , - 4 \}\)
• D) \(\varnothing\)

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