Created
December 19, 2017 10:35
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| x/(x+1) - (x+1)/(x+2) | |
| = (x+2)x/(x+1)(x+2) - (x+1)(x+1)/(x+1)(x+2) | |
| = ((x^2 + 2x) - (x^2 + 2x + 1))/(x+1)(x+2) | |
| = 1/(x+1)(x+2) |
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