Question

If, (a + 1)x2 + 2(a+1)x + (a – 2) = 0, then, for what parameter of ‘a’ the given equation have equal roots?
a) (-∞, -1)

b) [-1, ∞)

c) (0, 1)

d) Not possible​

Answer 1

the correct answer is

b) [ -1, ∞ ]