Determine the X Values That Cause the Function to Be $$f ( x ) = x \sqrt { x + 9 }$$

Determine the x values that cause the function to be (a) zero, (b) undefined, (c) positive, and (d) negative.
- $$f ( x ) = x \sqrt { x + 9 }$$

A) (a) $\{ - 9,0 \}$ , (b) $( \infty , - 9 )$ , (c) $( - 9,0 )$ , (d) $( 0 , \infty )$
B) (a) $\{ - 9 \}$ , (b) $( \infty , - 9 )$ , (c) $( - 9 , \infty )$ , (d) $\varnothing$
C) (a) $\{ 0 \}$ , (b) $( \infty, 0 )$ , (c) $( 0 , \infty )$ , (d) $\varnothing$
D) (a) $\{ - 9,0 \}$ , (b) $( - , - 9 )$ , (c) $( 0 , \infty )$ , (d) $( - 9,0 )$

Correct Answer:

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