Solved

Solve
- x44x245=0x ^ { 4 } - 4 x ^ { 2 } - 45 = 0

Question 48

Multiple Choice

Solve.
- x44x245=0x ^ { 4 } - 4 x ^ { 2 } - 45 = 0


A) {3,i5}\{ 3 , i \sqrt { 5 } \}
B) {5,5,3i,3i}\{ - \sqrt { 5 } , \sqrt { 5 } , - 3 i , 3 i \}
C) {9,5}\{ - 9,5 \}
D) {3,3,i5,i5}\{ - 3,3 , - \mathrm { i } \sqrt { 5 } , \mathrm { i } \sqrt { 5 } \}

Correct Answer:

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