Simplify \(\frac{4}{x+1}-\frac{3}{x-1}\)
MATHEMATICS
WAEC 1999
Simplify \(\frac{4}{x+1}-\frac{3}{x-1}\)
- A. \(\frac{x+7}{x^2 - 1}\)
- B. \(\frac{x-7}{x^2 + 1}\)
- C. \(\frac{x-7}{x^2 - 1}\)
- D. \(\frac{x-11}{x^2 - 1}\)
Correct Answer: C. \(\frac{x-7}{x^2 - 1}\)
Explanation
\(\frac{4}{x+1}-\frac{3}{x-1} \\
=\frac{4x - 4 - 3x - 3}{(x+1)(x-1)}=\frac{x-7}{x^2 - 1}\)
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