1. Find all -intercepts of the graph of . 2^2 - 10x + y^2 -10y + 25 =0
Write your answer as a list of ordered pairs, separated by commas. If there are no -intercepts, write "none".
2. Find all -intercepts of the graph of .x^2 - 2x + y^2 + 6y - 15 = 0
Write your answer as a list of ordered pairs, separated by commas. If there are no -intercepts, write "none".
3. Find the value of so that the graph of --- x^2 + y^2 - 12x + 14y - C = 0
passes through the point (10,1)
