Question 1142263
{{{(x+2)(x+c)}}}
{{{x^2+2x+cx+2c}}}
{{{x^2+(2+c)x+2c}}}



{{{x^2+bx+18=x^2+(2+c)x+2c}}}
--
{{{system(b=2+c,18=2c)}}}


{{{highlight(c=9)}}}
and
{{{highlight(b=11)}}}