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# how do you make a fraction separate?

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how do you make fractions separate?

Guest Aug 15, 2017
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Do you mean partial fractions?

$$\dfrac{1}{x^2 - 1}=\dfrac{a}{x-1}+\dfrac{b}{x+1}\\ 1=a(x+1)+b(x-1)=(a+b)x+a-b \\a=1/2\text{ and }b=-1/2\\ \therefore \dfrac{1}{x^2-1}=\dfrac{1}{2(x-1)}-\dfrac{1}{2(x+1)}$$

We made 1/(x^2-1) seperate into 2 fractions: 1/(2(x-1)) and -1/(2(x+1)).

MaxWong  Aug 15, 2017

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