Decide What Values of the Variable Cannot Possibly Be Solutions $$x ^ { 4 } + 720 = 89 x ^ { 2 }$$

question 301

Multiple Choice

Decide what values of the variable cannot possibly be solutions for the equation.
- $$x ^ { 4 } + 720 = 89 x ^ { 2 }$$

• A) \(\{ - 80 , - 9,9,80 \}\)
• B) \(\{ 9,80 \}\)
• C) \(\{ - 4 \sqrt { 5 } , - 3,3,4 \sqrt { 5 } \}\)
• D) \(\{ 3,4 \sqrt { 5 } \}\)

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