Answer
$$x=13$$
$$x=-2$$
Work Step by Step
We have $$x(x-11)=26$$
Expanding the equation and sending all the terms to the left side of the equation $$x^2-11x-26=0$$
Factorizing $$(x-13)(x+2)=0$$
Solving each parenthesis 1) $$x-13=0$$ $$x=13$$
2)$$x+2=0$$ $$x=-2$$