# Thread: factorise

1. ## factorise

$x^5+x^3+x$

I am not sure how to factorise the above equation as its constant term is 0 .

2. Originally Posted by mathaddict
$x^5+x^3+x$

I am not sure how to factorise the above equation as its constant term is 0 .
$=x(x^4+x^2+1)$
Now its constant term is 1

$x^4+x^2+1=x^4+2x^2+1-x^2=(x^2+1)^2-x^2$

can you finish it ?