Question

2x to the fourth power + 5x squared + 3, factored

Answer 1

We want to factor:
$2x^4+5x^2+3$

This may seem tricky because of the high powers, but remember that $x^4=(x^2)^2$. Then we can factor it as:
$2x^4+5x^2+3=(2x^2+3)(x^2+1)$

Answer 2

(x squared+1)(2x squared+3)