[tex]\sqrt{x64} -\sqrt[3]{64} = 8-4=4\\\\2\sqrt{36} -3\sqrt{121} =2*6 -3*11 = 12 - 33 = -21\\\sqrt{1\frac{7}{9} } +\sqrt{0,16} = \sqrt{\frac{16}{9} } +0,4 = \frac{4}{3} + \frac{2}{5} = \frac{20}{15} + \frac{6}{15} =\frac{26}{15} = 1 \frac{11}{15} \\3\sqrt{3} + 2\sqrt{12} = 3\sqrt{3} + 2*2\sqrt{3} = 3\sqrt{3} +4\sqrt{3} =7\sqrt{3} \\3\sqrt{\frac{4}{9} } -\sqrt{\frac{1}{25} } = 3\frac{2}{3} + \frac{1}{5} =3\frac{10}{15} +\frac{3}{15} = 3 \frac{13}{15}[/tex]
