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Mathematics
Mathematics
Problem
ABCD is a square whose side is
a
a
a
. The equation of the circle circumscribing the square, taking AB and AD as the axes of reference is a.
x
2
+
y
2
+
a
x
+
a
y
=
0
x^2 + y^2 + ax + ay = 0
x
2
+
y
2
+
a
x
+
a
y
=
0
b.
x
2
+
y
2
−
a
x
+
a
y
=
0
x^2 + y^2 - ax + ay = 0
x
2
+
y
2
−
a
x
+
a
y
=
0
c.
x
2
+
y
2
−
a
x
−
a
y
=
0
x^2 + y^2 - ax - ay = 0
x
2
+
y
2
−
a
x
−
a
y
=
0
d.
x
2
+
y
2
+
a
x
−
a
y
=
0
x^2 + y^2 + ax - ay = 0
x
2
+
y
2
+
a
x
−
a
y
=
0
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