27.
[tex] a)\sqrt{3721} = 61 \\ \\ \sqrt{1936} = 44 \\ \\ \sqrt{4624} = 68 \\ \\ \sqrt{9216} = 96[/tex]
[tex]b) \sqrt{7225} = 85 \\ \\ \sqrt{2209} = 47 \\ \\ \sqrt{7056} = 84 \\ \\ \sqrt{3969} = 63[/tex]
[tex]c) \sqrt{2116} = 46 \\ \\ \sqrt{3481} = 59 \\ \\ \sqrt{3844} = 62 \\ \\ \sqrt{2916} = 54[/tex]
[tex]d) \sqrt{12769} = 113 \\ \\ \sqrt{45369} = 213 \\ \\ \sqrt{15129} = 123 \\ \\ \sqrt{15876} = 126[/tex]
28.
[tex]a) \sqrt{20449} + \sqrt{285156} + \sqrt{54289} = 143 + 534 + 233 = 910[/tex]
[tex]b) \sqrt{2916} + \sqrt{41616} - \sqrt{11664} = 54 + 204 - 108 = 150[/tex]
[tex]c) \sqrt{229441} + \sqrt{301401} - \sqrt{546121} = 479 + 549 - 739 = 289[/tex]
[tex]d) \sqrt{467856} + \sqrt{264196} - \sqrt{826281} = 684 + 514 - 909 = 289[/tex]
