Question 983030
That means y=0.
You want some points   (x,0), two different x.


Distance formula with the coordinate values substituted,{{{sqrt((x-1)^2+(0-8)^2)=10}}}


{{{(x-1)^2+(64)=100}}}


{{{x^2-2x+1+64-100=0}}}


{{{x^2-2x-35=0}}}


{{{(x-7)(x+5)=0}}}
x=7 or x=5.