Question

Equation of a circle passing through (1, 2) and (2, 1) and for which line x + y = 2 is a diameter,
is :
(A) x2 + y2 + 2x + 2y -- 11=0
(B) x2 + y2 - 2x - 2y - 1 = 0
(C) x2 + y2 - 2x - 2y +1 = 0
(D) None of these
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Answer 1

Answer:

the answer is c

Step-by-step explanation:

the step is long and i an busy so.....