Question

(x+4)(x^2+16)(x-4),(x-1/3)（x^2+1/9)(x+1/3),

Answer 1

(x+4)(x^2+16)(x-4)

=(x-4)(x+4)(x^2+16)

=(x^2-16)(x^2+16)

=x^4-256

(x-1/3)（x^2+1/9)(x+1/3),

=(x-1/3)(x+1/3)(x^2+1/9)

=(x^2-1/9)(x^2+1/9)

=x^4-1/81