Partial fraction decomposition question

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SUMMARY

The discussion focuses on the process of partial fraction decomposition for the expression (ax + b) / (x^2 - 9). The correct decomposition is A/(x - 3) + B/(x + 3). Participants emphasize the necessity of showing work to identify errors in the calculation, as the initial results of (a + b)/2 and (a - b)/2 are incorrect. The community stresses the importance of clarity in mathematical steps to reach the correct solution.

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Determine A and B in terms of a and b.

ax + b divided by x^2− 9=A/x-3 + B=x+3

When i calculate it i get a+b/2 and a-b/2 but that's wrong. I need help with this one.
 
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Could you post your work?
 
Until you post your work, all we can say is, yes, that's completely wrong. I can't imagine how you would get that.
 

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