[" The factors of "a^(2)-1-2x-x^(2)," ar...

[" The factors of "a^(2)-1-2x-x^(2)," are "quad " (b) "(a+x-1)(a-x+1)],[[" (a) "(a-x+1)(a-x-1)," (d) none of these "],[" (c) "(a+x+1)(a-x-1)," (d) "]]

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