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Mathematics
Mathematics
Problem
Let
f
(
x
)
=
2
x
2
−
1
f(x)=2x^{2}-1
f
(
x
)
=
2
x
2
−
1
and
g
(
x
)
=
3
x
+
4
g(x)=3x+4
g
(
x
)
=
3
x
+
4
. Find
(
f
+
g
)
(
−
2
)
(f+g)(-2)
(
f
+
g
)
(
−
2
)
. a)
−
7
-7
−
7
b)
7
7
7
c)
5
5
5
d)
−
1
-1
−
1
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