Answer:
1.x
²
+
y²
=
49
2.(x + 4)² + (y + 4)² = 25
Step-by-step explanation:
1.The equation of a circle is
(
x
−
h
)²
+
(
y
−
k
)²
=
r²
Where
(
h
,
k
) are the center of the circle and
r is the radius
The center is
(
0
,
0
)
and r
=
7
(
x
−
0
)²
+
(
y
−
0
)
²
=
7
²
x
²
+
y²
=
49
2.(x + 4)² + (y + 4)² = 5.
(x + 4)² + (y + 4)² = 25
