First, Write the Value(s) That Make the Denominator(s) Zero $y _ { 1 } = \frac { 9 } { x + 2 } , y _ { 2 } = \frac { 7 } { x - 2 } , y _ { 3 } = \frac { 10 } { x ^ { 2 } - 4 }$

question 359

Multiple Choice

First, write the value(s) that make the denominator(s) zero. Then solve the equation.
- $y _ { 1 } = \frac { 9 } { x + 2 } , y _ { 2 } = \frac { 7 } { x - 2 } , y _ { 3 } = \frac { 10 } { x ^ { 2 } - 4 }$ , and $y _ { 1 } - y _ { 2 } = y _ { 3 }$

• A) \(\{ 21 \}\)
• B) \(\{ - 21 \}\)
• C) \(\{ \sqrt { 57 } \}\)
• D) \(\{ 42 \}\)

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