To answer this question, you need to be adept at algebraic manipulation.
Your calculator won’t help here. To subtract fractions, even algebraic
fractions like these, you need a common denominator, which in this case is
the product of the denominators x – 1 and x + 1:
The answer is (E).
Here’s a question for which you have a choice. You can answer it just as
quickly and easily with or without a calculator.
Figure 1