\[\boxed{\text{414\ (414).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ y = \sqrt{- x^{2}}\]
\[- x^{2} \geq 0\]
\[x^{2} \leq 0\]
\[x = 0;\]
\[y = 0.\]
\[График\ функции\ y =\]
\[= \sqrt{- x^{2}} - точка\ (0;0).\]
\[2)\ y = \sqrt{- x^{2} - 4x - 4} + 2\]
\[y = \sqrt{- \left( x^{2} + 4x + 4 \right)} + 2\]
\[y = \sqrt{- (x + 2)^{2}} + 2\]
\[- (x + 2)^{2} \geq 0\]
\[(x + 2)^{2} \leq 0\]
\[x + 2 = 0\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \]
\[x = - 2\ (единственное\ решение)\]
\[y = 2.\]
\[График\ функции\ y =\]
\[= \sqrt{- x^{2} - 4x - 4} +\]
\[+ 2 - точка\ ( - 2;2).\]
\[3)\ y = \left( \sqrt{x} \right)^{2}\]
\[x \geq 0.\]
\[y = x.\]