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Polynomials
medium
0:00.0
Simplify:
(
x
2
+
1
)
(
x
2
−
1
)
+
1
(x^2 + 1)(x^2 - 1) + 1
(
x
2
+
1
)
(
x
2
−
1
)
+
1
.
A
x
4
x^4
x
4
B
x
2
x^2
x
2
C
1
D
x
4
−
1
x^4 - 1
x
4
−
1
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