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What is the partial fraction decomposition, I know D is wrong

What is the partial fraction decomposition, I know D is wrong-example-1
User Sucotronic
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(7x^2+14)/((x^2+3)^2)=(7x^2+21-7)/((x^2+3)^2)=(7x^2+21)/((x^2+3)^2)-(7)/((x^2+3)^2)=(7(x^2+3))/((x^2+3)^2)-(7)/((x^2+3)^2)=\\=(7)/(x^2+3)-(7)/((x^2+3)^2)

User Tobo
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