Find a polynomial equation with real coefficients that has the given roots.4i, 
A. x4 + 9x2 - 112 = 0
B. x4 + 18x2 + 112 = 0
C. x4 - 18x2 + 112 = 0
D. x4 - 9x2 - 112 = 0
Answer: A
Mathematics
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A. 
B. 
C. 
D. 
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A. x = 18 B. x = 13.5 C. x = 24 D. x = 22.5
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A. - 
B. - 
C. - 
D. - 
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