Question 326401
Use the distance equation,
{{{D^2=(x1-x2)^2+(y1-y2)^2}}}
{{{10^2=(-6-(-12))^2+(-2-y)^2}}}
{{{100=(-6+12)^2+(y+2)^2}}}
{{{(y+2)^2=100-36}}}
{{{(y+2)^2=64}}}
{{{y+2=0 +- 8}}}
{{{y=-2 +- 8}}}
{{{y1=-10}}} and {{{y2=6}}}
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{{{drawing(300,300,-14,8,-14,8,grid(1),circle(-12,6,.3),circle(-12,-10,.3),circle(-6,-2,10),circle(-6,-2,.3),green(line(-6,-2,-12,6)),green(line(-6,-2,-12,-10)),blue(line(-12,20,-12,-20)),graph(300,300,-14,8,-14,8,0))}}}
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(-12,-10) and (-12,10) are both 10 units away from (-6,-2)
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