Question

Find the equation of a circle passing through center (-1/2,-9)with radius 5

Answer 1

Answer:

Since the centre of the circle is (−1,−2) and its radius 5

∴ the equation of the circle is (x−(−1))  

2

+(y−(−2))  

2

=5  

2

 

⇒(x+1)  

2

+(y+2)  

2

=25

⇒x  

2

+2x+1+y  

2

+4y+4−25=0

⇒x  

2

+y  

2

+2x+4y−20=0

Step-by-step explanation: