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Polynomials
hard
0:00.0
How many positive real roots does
x
5
−
2
x
4
+
x
3
−
1
=
0
x^5 - 2x^4 + x^3 - 1 = 0
x
5
−
2
x
4
+
x
3
−
1
=
0
have?
A
1
B
2
C
3
D
0
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