I know that the trinomial formula for factorization when the coefficient for $x^2$ is $1$ is as follows:
$x^2 + bx + c = (x+x_1)(x+x_2)$ $s.t.:$
$x_1 + x_2 = b$ $and$ $x_1 \cdot x_2 = c$
Could anyone explain what changes when $a \neq 1$? How will this affect the factorization?
Thanks in advance =)