Question

factors of 3x⁴ - 1 are
1. (3) (x + 1 ) (x - 1 )
2.(x² + 1 ) ( x - 1 ) ( x + 1 )
3. (3) (x² + 1 )( x - 1 ) ( x + 1 )
4. (x² + 1 ) (x - 1) (x - 1)

Answer 1

(3)(x^2+1)(x-1)(x+1)=3[(x^2+1)(x^2-1^2)]

=3[X^4-x^2+x^2-1]

=3[x^4-1]