Posted by Dee on Monday, November 18, 2013 at 8:54pm.
Help me factor x^2 2x  4 = 0 and 3x^2 + x + 3 = 0.

algebra  Kuai, Monday, November 18, 2013 at 9:36pm
No factor

algebra  Steve, Tuesday, November 19, 2013 at 5:41am
you can tell there are no rational roots because the discriminant is negative. No real roots, no factoring.
You can factor over the irrationals or complex, though, getting
(x1√5)(x1+√5)
and
1/12 (6x+1i√35)(x+1+i√35)