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hard • Past Paper
Factorize: x^2 + 1/x^2 + 11
A
(x + 1/x + 3)(x + 1/x - 3)
B
(x + 1/x + √11)^2
C
(x + 1/x)^2 + 9
D
(x^2+3)(x^2-3)