rational inequalities

[stuck quiver]

my teacher linked an answer sheet and it says it supposed to be (-1,1) but idk how he got it

[amber kestrel]

You are looking when your function is negative

or 0

so it should be actually be (-1,1]

including 1

You wanna scan that yellow area

And the function is within that range for from x > -1 until x = 1