What is the value of x^2-1?
(1) The value of x^2 - 5x is -6
(2) The value of (x^2 - 1)/(x + 1) is 1
(1) The value of x^2 - 5x is -6
(2) The value of (x^2 - 1)/(x + 1) is 1
1 - insufficient. x^2 - 5x + 6 = 0 implies x = 2 or x = 3rajesh_ctm wrote:What is the value of x^2-1?
(1) The value of x^2 - 5x is -6
(2) The value of (x^2 - 1)/(x + 1) is 1
2 - insufficient. (x+1)(x-1)/(x+1) = 1. We cannot cancel out
x+1 from numerator and denominator unless we know x != -1.
Alternatively, x^2 - 1 = x + 1. So, x^2 -x -2 = 0 implies
x = 2 or x = -1
Combining 1 and 2, we have x = 2.
Is C the answer ?
