You can't do that because 12 plus 60 plus 61 equals 173 unless yo take out the twelve but if you can only use the given variables then you cant do that
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Radius = 1111
x2+3=124 x2=121 x= square root(121) x=11
Centre = (0,0), the origin; radius = 11
If this is the equation of a circle, the answer is 11, except that there needs to be a plus sigb between the x2 and the y2
174