Question 1151675
<pre>{{{"f(x)"= x^4+26x^2+25}}}

Factor:

{{{"f(x)"= (x^2+25)(x^2+1)}}}


{{{x^2+25=0}}}
{{{x^2=-25}}}
{{{x="" +- 5i}}}

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

Four complex zeros:  5i, -5i, +i, -i

Edwin</pre>