Use linear interpolation to find the root(s) of the equation correct to 3 decimal places.

I drew the graph of the functions on the two sides.

I concluded that the roots are between -0.5 and -1, and 0.5 and 1.

And found them to 3 d.p. to be -0.896 and 0.826.

My problem is that the answer given is 0. Which definitely cannot be the roots of the equations.

Thanks!