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    (x+1)/ (Xsquared -4)

    Does it become (x+1)/ (x+2)(x-2)

    Then x+1 = A(x-2) + B(x+2)

    Then let x=2 Get B as 3/4
    Then let x= -2 Get A as 1/4

    1/4(x+2) - 3/4(x-2)

    But when i work backwords isn't right

    Thanks
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    Is B 3/4 or -3/4?
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    (Original post by ViolinGirl)
    (x+1)/ (Xsquared -4)

    Does it become (x+1)/ (x+2)(x-2)

    Then x+1 = A(x-2) + B(x+2)

    Then let x=2 Get B as 3/4
    Then let x= -2 Get A as 1/4

    1/4(x+2) - 3/4(x-2)

    But when i work backwords isn't right

    Thanks
    in bold. one is different from the other
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    (Original post by ian.slater)
    Is B 3/4 or -3/4?
    Sorry, typing error. It is 3/4.

    But is the method right?
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    (Original post by mathz)
    in bold. one is different from the other
    It is 3/4 so will be +3/4. Sorry, typed it wrong.

    But just worked back again, and it still isn't going back to original fraction
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    Yes it's right. 0.25/(x+2) + 0.75/(x-2)
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    The above user is correct.

    Check wolfram alpha to verify.
 
 
 
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