#### Answer

$x-2\sqrt{11x}+11$

#### Work Step by Step

$(\sqrt x-\sqrt{11})^2$
$(\sqrt{x}-\sqrt{11})(\sqrt{x}-\sqrt{11})$
Use the FOIL method to multiply the binomial.
Multiply the First terms, the Outside terms, the Inside terms, and the Last terms.
$(\sqrt{x}\times\sqrt{x})+(-\sqrt{11}\times\sqrt x)+(-\sqrt{11}\times\sqrt x)+(-\sqrt{11}\times-(\sqrt {11}))$
Simplify.
$x+(-\sqrt{11x})+(-\sqrt{11x})+11$
Combine like terms/like radicals.
$x-2\sqrt{11x}+11$