Question 1006634

Find every value for the variable that makes the expression undefined

x^2-36 over x^2+11x+28
<pre>Set denominator equal to 0
{{{x^2 + 11x + 28 = 0}}}
(x + 7)(x  + 4) = 0 ------- Factoring trinomial
x = - 7     OR      x = - 4 ------- Solving for x, after setting each factor equal to 0
Expression is undefined when: {{{highlight_green(system(x = - 7_OR,x = - 4))}}}