Question: ( 5 x - 2 ) / ( x ^ ( 4 ) + 2 x ^ ( 2 ) + 1 ) ( Circle

(5x-2)/(x^(4)+2x^(2)+1)
(Circle the correct answer.)
a.(5x-2)/(x^(4)+2x^(2)+1)=(A)/(x^(2)+1)+(B)/((x^(2)+1)^(2))
b.(5x-2)/(x^(4)+2x^(2)+1)=(Ax+B)/(x^(2)+1)
c.(5x-2)/(x^(4)+2x^(2)+1)=(Ax+B)/(x^(2)+1)+(Cx+D)/((x^(2)+1)^(2))
d.(5x-2)/(x^(4)+2x^(2)+1)=(A)/(x+1)+(B)/((x+1)^(2))+(C)/((x+1)^(3))+(D)/((x+1)^(4))
( 5 x - 2 ) / ( x ^ ( 4 ) + 2 x ^ ( 2 ) + 1 ) (

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