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Mathematics
Mathematics
Problem
In the
x
y
xy
x
y
-plane, if the parabola with equation
y
=
a
(
x
+
2
)
2
−
15
y = a(x+2)^2 - 15
y
=
a
(
x
+
2
)
2
−
15
passes through
(
1
,
3
)
(1,3)
(
1
,
3
)
, what is the value of
a
a
a
?
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