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Mathematics
Problem
Find the smaller root of the quadratic equation
x
2
−
10
x
+
21
=
0
x^{2}-10x+21=0
x
2
−
10
x
+
21
=
0
. a)
7
7
7
b)
−
3
-3
−
3
c)
3
3
3
d)
5
5
5
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