Question

c=(-1/2),r=5 find the equation of circle

Answer 1

Step-by-step explanation:

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 =5²

⇒(x+1)²+(y+2)²=25

⇒x² +2x+1+y² +4y+4−25=0

⇒x²+y²+2x+4y−20=0