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Which fraction needs long division before it can be decomposed?
A5/(x^2-9)
B(2x+1)/(x^2+4)
Cx/(x+1)^3
D(x^3+2)/(x^2+1)
Answer & Solution
Correct answer: D. (x^3+2)/(x^2+1)
Only (x^3+2)/(x^2+1) has numerator degree 3, which is not below denominator degree 2.
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