Question

how to solve
$x { }^{2} + 2x + 4$

Answer 1

see we have general equation
${x}^{2} + sx + p = 0$
here p=4 and sum=2
so by splitting method it can't be splitted as equation contains imaginary roots
use quadratic formula
x=(-(2)(+/-)√4-16)/2
x={-2(+/-)i√12}/2
here .i is iota... complex vala