Question 956069
F is factorable.


{{{F(x)=(x^2+49)(x^2+1)}}}


Each factor has a pair of complex zeros.

{{{x^2=-49}}}
{{{x=0+- i*sqrt(7)}}}


{{{x^2=-1}}}
{{{x=0+- i}}}


Completely factored form,
{{{highlight(y=(x+i*sqrt(7))(x-i*sqrt(7))(x+i)(x-i))}}}