y=x^2-x-6
find the y n x values
This is a parabola, there is an infinite number of x,y coordinates that will make this true.
Perhaps you actually want the solutions to
0=x^2-x-6
0=(x-3)(x+2)
x=3 or x=-2
The roots of y=x^2-x-6
are (3,0) and (-2,0)