Find the centre and radius of the circle x^2+y^2+4x-10y-21=0
Find the coordinates of centre of C and Radius
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Answer:
he equation of the given circle is x
2
+y
2
−4x−8y−45=0.
(x
2
−4x)+(y
2
−8y)=45
(x−2)
2
+(y−4)
2
−4−16=45
(x−2)
2
+(y−4)
2
=65
(x−2)
2
+(y−4)
2
=(
65
)
2
Thus, the centre of the given circle is (2,4) and radius is
65
.
Step-by-step explanation:
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