



 
Abeth, Let's try a slightly different question
I would use the distance formula which says that if (a, b) and (c, d) are points in the plane then the distance between them is
If the distance between (x, 3) and (2, 1) is equal to the distance between (x, 3) and (3, 3) then
Since the quantities under the root signs on both sides are positive
Expanding I get
thus
You can now check by finding the distance between (5/2, 3) and (2, 1), and the distance between (5/2, 3) and (3, 3) Now you try your first problem. For the second problem, what do you know about the coordinates of a point on the yaxis? Penny  


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