Solutions
Get detailed explanations to advanced GMAT questions.
Question
If x ≠ – 1, then 
is equal to
Option A:
-1
Option B:
1
Option C:
x
Option D:
1-x
Option E:
x-1
Difficulty Level
MediumSolution
Option D is the correct answer.
Option Analysis
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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