ABC26GN1204 · Simplification

Subject: General Aptitude · Chapter: Simplification · Exam: · Marks: · Difficulty:

If $\frac{x^{2}-1}{x+1}=4, x=$ ?

(a)0

(b)1

(c)5

(d)Cannot be determined

Answer

Answer (as printed): C

Explanation

$$\frac{x^{2}-1}{x+1}=4 \Leftrightarrow \frac{(x+1)(x-1)}{x+1}=4 \Leftrightarrow x-1=4 \Leftrightarrow x=5 .$$

Explanation as extracted from the printed page; notation may be imperfect.