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Foundations
hard
0:00.0
If
x
2
−
x
−
1
=
0
x^2 - x - 1 = 0
x
2
−
x
−
1
=
0
, compute
x
4
−
3
x
2
+
1
x^4 - 3x^2 + 1
x
4
−
3
x
2
+
1
.
A
0
0
0
B
1
1
1
C
−
1
-1
−
1
D
3
3
3
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