Question

what about says nature of roots of Xsquare-X-2=0​

Answer 1

$x^2-x-2=0\\a=1\\b=-1\\c=-2\\D=b^2-4ac\\D=(-1)^2-4*1*(-2)\\D=1+8\\D=9$

As D > 0 , hence , nature of roots is real and unique .