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Inequalities
hard
0:00.0
If
x
x
x
is a real number, the minimum value of
x
2
−
4
x
+
7
x^2 - 4x + 7
x
2
−
4
x
+
7
is:
A
3
B
7
C
0
D
−
4
-4
−
4
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