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Mathematics
Problem
Explain why the value
x
=
−
2
x=-2
x
=
−
2
is excluded from the domain of the function
g
(
x
)
=
x
2
−
4
x
+
2
g(x)=\dfrac{x^{2}-4}{x+2}
g
(
x
)
=
x
+
2
x
2
−
4
.
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