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Mathematics, 22.02.2020 22:32 Ramar59

I am supposed to simplify 1/a-b - 1/b-a

The answer is 2/ a-b

But I don't know how they got the denominator during the working and the final answer.
Please help, thank you

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I am supposed to simplify 1/a-b - 1/b-a

The answer is 2/ a-b

But I don't kno...
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