Solve $y ^ { 4 } - 10 y ^ { 2 } + 9 = 0$

question 87

Multiple Choice

Solve: $y ^ { 4 } - 10 y ^ { 2 } + 9 = 0$

• A) \(\{ 9,1 \}\)
• B) \(\{ 3,1 \}\)
• C) \(\{ 3 , - 3,1 , - 1 \}\)
• D) \(\{ - 9 , - 1 \}\)

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