The equation [ x – 1][x + 1] = a^2 – 2a – 3 can have real solutions for x if a belongs to

1. ( – infinity to – 1] union [ 3 to infinity)
2. [ 1 – underroot 5 , – ] union [3, 1+ underroot 5]
3. [1 – underroot 5, 1+underroot 5]

muktesh singh , 10 Years ago

Grade 11