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Mathematics
Problem
The equation of the tangent to the circle
x
2
+
y
2
+
4
x
−
4
y
+
4
=
0
x^2 + y^2 + 4x - 4y + 4 = 0
x
2
+
y
2
+
4
x
−
4
y
+
4
=
0
which make equal intercepts on the positive coordinate axes is a.
x
+
y
=
2
x + y = 2
x
+
y
=
2
b.
x
+
y
=
2
2
x + y = 2\sqrt{2}
x
+
y
=
2
2
c.
x
+
y
=
4
x + y = 4
x
+
y
=
4
d.
x
+
y
=
8
x + y = 8
x
+
y
=
8
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