How to simplify the problem of mathematics from [1 / (x + 1)] * {(x-1) / (x + 3)} + 1] to [1 / (x + 1)] * [2 (x + 1) / (x + 3)],

How to simplify the problem of mathematics from [1 / (x + 1)] * {(x-1) / (x + 3)} + 1] to [1 / (x + 1)] * [2 (x + 1) / (x + 3)],


[1/（x+1）]*{（x-1）/（x+3）}+1]
=[1/（x+1）]*{ [（x-1）+（x+3）] /（x+3）}
=[1/（x+1）]*[2(X+1)/(X+3)]



If - 3 < x < 5, | x + 3 | - | X-5 | is reduced to all


- 3 < x, so x + 3 > 0, | x + 3 | = x + 3
X < 5, so X-5

Elden Ring Premiere

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