Express f(x) in complete factored form.f(x) = x4 + 49x2
A. f(x) = x2(x + 7i)2
B. f(x) = x2(7x + i)(7x - i)
C. f(x) = x2(7x + i)2
D. f(x) = x2(x + 7i)(x - 7i)
Answer: D
Mathematics
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