may b
itz write
c f(x)=x2-1
so inversin
it
u get
(x-1)^!/2=y
so substituttinn
17 u egt
+-4
n then
sbstitutin
-3
u get (-4)^1/2
wich dnt cum out
so itz c)

 

shayad nt sure of ma last steps those(-4)^1/2 one