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Mathematics
Problem
For the function
h
(
x
)
=
x
2
−
4
h(x)=x^{2}-4
h
(
x
)
=
x
2
−
4
, the value
h
(
x
)
=
5
h(x)=5
h
(
x
)
=
5
is attained at which set of all preimages? a)
{
3
}
\{3\}
{
3
}
b)
{
1
,
−
1
}
\{1,-1\}
{
1
,
−
1
}
c)
{
3
,
−
3
}
\{3,-3\}
{
3
,
−
3
}
d)
{
5
,
−
5
}
\{\sqrt{5},-\sqrt{5}\}
{
5
,
−
5
}
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