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The point is in fourth quadrant.
Required points are on the - axis those are
units from
.
So the coordinates are
.
Plot the circle center at and radius of the circle is
.
The circle equation is .
Substitute in
.
.
Compare it with quadratic equation .
.
Roots are .
.
.
The points on the - axis that are
units from the point
are
.
The points are .