Decide What Values of the Variable Cannot Possibly Be Solutions $90 x ^ { - 2 } - 5 x ^ { - 1 } = 20$

question 81

Multiple Choice

Decide what values of the variable cannot possibly be solutions for the equation.
- $90 x ^ { - 2 } - 5 x ^ { - 1 } = 20$

• A) \(\left\{ 2 , - \frac { 9 } { 4 } \right\}\)
• B) \(\left\{ \frac { 1 } { 2 } , - \frac { 4 } { 9 } \right\}\)
• C) \(\left\{ \frac { 1 } { 2 } , \frac { 4 } { 9 } \right\}\)
• D) \(\left\{ - \frac { 1 } { 2 } , - \frac { 4 } { 9 } \right\}\)

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