Answer
$(x+13)(x-2)$
Work Step by Step
$x^2+11x-26$ has no common monomial factors.
=$(\ \ \ \ \ \ \ \ \ )(\ \ \ \ \ \ \ \ \ )$
=$(x\ \ \ \ \ \ \ )(x\ \ \ \ \ \ \ )$
=$(x+\ \ )(x-\ \ )$ The factors of -26 must have dislike terms.
=$(x+13)(x-2)$ 13 and -2 have a sum of 11 and a product of -26.