Question

Алгебра 8 класс

Answer 1

$\displaystyle \frac{( \sqrt{11} -2)^2-11}{\sqrt{11} -1} = \frac{11-4\sqrt{11} +4-11}{\sqrt{11} -1} = \frac{4-4\sqrt{11} }{\sqrt{11} -1}= \frac{-4(\sqrt{11}-1)}{\sqrt{11}-1} =-4$