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Math Help - Partial fractions - 2

  1. #1
    Junior Member Greymalkin's Avatar
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    Partial fractions - 2

    Partial fractions - 2-trig2.png
    Why is the coefficient of the x4 term stated like 0=1/3+B+D
    I foil all of the terms and get the same result x^4(A+B+D) but why is the equation 0=? Isnt the equality the x's coefficient(which is 1) equal to the variables?
    Why is it 0=A+B+D??
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    Forum Admin topsquark's Avatar
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    Re: Partial fractions - 2

    Quote Originally Posted by Greymalkin View Post
    Click image for larger version. 

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    Why is the coefficient of the x4 term stated like 0=1/3+B+D
    I foil all of the terms and get the same result x^4(A+B+D) but why is the equation 0=? Isnt the equality the x's coefficient(which is 1) equal to the variables?
    Why is it 0=A+B+D??
    Because no terms of x^4 appear in the numerator of the original fraction.

    -Dan
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