Answer:
Given circle equation x
2
+y
−4x−8y−45=0
here2g=−4
∴g=−2
and2f=−8
∴f=−4
∴centre(−g,−f)=(2,4)
radius=
g
+f
−c
=
+4
−(−45)
4+16+45
65
unit
Step-by-step explanation:
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Answers & Comments
Answer:
Given circle equation x
2
+y
2
−4x−8y−45=0
here2g=−4
∴g=−2
and2f=−8
∴f=−4
∴centre(−g,−f)=(2,4)
radius=
g
2
+f
2
−c
=
2
2
+4
2
−(−45)
=
4+16+45
=
65
unit
Step-by-step explanation: