Question

What is the HCF of   (x4  - x2  - 6)    and   (x4  - 4x2  + 3) ? (a)  x2  - 3                          (b)    x + 2  (c)   x + 3                         (d)   x2  + 3

A (a)
B (b)
C (c)
D (d)
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