Get detailed explanations to advanced GMAT questions.

If x ≠ – 1, then is equal to

Option A:

-1

Option B:

1

Option C:

x

Option D:

1-x

Option E:

x-1

Option D is the correct answer.

We can use a2 – b 2 = (a+b)(a-b)

So in the given expression, only (1-x) is left in the numerator all the other will get cancel with denominator.

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