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Mathematics
Mathematics
Problem
Find all real values of
x
x
x
that satisfy
r
(
x
)
=
0
r(x)=0
r
(
x
)
=
0
for the polynomial
r
(
x
)
=
x
2
−
4
r(x)=x^{2}-4
r
(
x
)
=
x
2
−
4
.
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