Question

if x²+y²-2x-4y+5=0 then find the value of x-y.​

Answer 1

Answer:

x2+y2−2x+4y+5=0

(x−1)2+(y+2)2−5+5=0

⇒(x−1)2+(y+2)2=0

Since, radius is 0, hence its a point

Alternative method:

Here, a=b=1

r=1+4−5=0

Hence, a circle of radius 0. So, its a point.