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Mathematics
Problem
The radical centre of the circles
x
2
+
y
2
=
1
x^2 + y^2 = 1
x
2
+
y
2
=
1
,
x
2
+
y
2
+
10
y
+
24
=
0
x^2 + y^2 + 10y + 24 = 0
x
2
+
y
2
+
10
y
+
24
=
0
and
x
2
+
y
2
−
8
x
+
15
=
0
x^2 + y^2 - 8x + 15 = 0
x
2
+
y
2
−
8
x
+
15
=
0
is a.
(
2
,
5
/
2
)
(2, 5/2)
(
2
,
5/2
)
b.
(
−
2
,
5
/
2
)
(-2, 5/2)
(
−
2
,
5/2
)
c.
(
−
2
,
−
5
/
2
)
(-2, -5/2)
(
−
2
,
−
5/2
)
d.
(
2
,
−
5
/
2
)
(2, -5/2)
(
2
,
−
5/2
)
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