Question

Find the equation of the circle having centre at (3,5) and passing through the point of intersection of the lines 2x+y-3=0 and x-y-9=0​

Answer 1

2x+y-3 = 0

2x + y = 0 + 3

2x + y = 3

x + y = 3 - 2

x + y = 1

xy = 1