Express f(x) in complete factored form.f(x) = x4 + 9x2
A. f(x) = x2(3x + i)(3x - i)
B. f(x) = x2(x + 3i)2
C. f(x) = x2(3x + i)2
D. f(x) = x2(x + 3i)(x - 3i)
Answer: D
Mathematics
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A. 10
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- 
A. -1
B. 0
C. -6
D. - 
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Find the unknown value in the percent proportion 
Round to the nearest tenth, if necessary.part = 75, percent = 4
A. whole = 187.5 B. whole = 5.3 C. whole = 937.5 D. whole = 1875
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A. 
B. 
C. 
D. 
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