[tex]\displaystyle\bf\\1)\\\\x^{2} =36\\\\x_{1,2} =\pm \ \sqrt{36} =\pm \ 6\\\\Otvet: \ -6 \ ; \ 6\\\\\\2)\\\\\sqrt{x} -5=0\\\\\sqrt{x} =5\\\\x=25\\\\Otvet: \ 25[/tex]