Question 183215
(1) {{{x = -11}}}
(2) {{{x = -1}}}
Add {{{11}}} to both sides of (1)
Add {{{1}}} to both sides of (2)
(1) {{{x + 11 = 0}}}
(2) {{{x + 1 = 0}}}
Their product also = {{{0}}}
{{{(x + 11)(x + 1) = 0}}}
{{{x^2 + 12x + 11 = 0}}} answer