Question

the discriminant of x^2-2x-(r^2-1)=0​

Answer 1

Step-by-step explanation:

D=b^2-4ac_______(1)

as,

a=1,b=-2 and c=(r^2-1)

putting value of a,b and c in eq^n(1)

D=(-2)^2-4(1)(r^2-1)

D=4-4r^2+4

D=8-4r^2

________this is your answer___________