Question

dau coroana!!!!!!!!!​

Answer 1

$a)18\sqrt{3} -36\sqrt{2} +30\sqrt{3} -45\sqrt{2} -21\sqrt{3} +7\sqrt{2} \\=27\sqrt{3} -74\sqrt{2}$$c)\frac{18\sqrt{2}-24\sqrt{3} }{6} -8\sqrt{3} -6\sqrt{2} -\frac{30\sqrt{3}+15\sqrt{2} }{5} =\frac{6(3\sqrt{2}-4\sqrt{3} }{6} +8\sqrt{3} -6\sqrt{2} -\frac{5(6\sqrt{3} +3\sqrt{2} }{5} \\=3\sqrt{2} -4\sqrt{3} +8\sqrt{3} -6\sqrt{2}-6\sqrt{3} -3\sqrt{2} =-2\sqrt{3} -6\sqrt{2}$

$b)20\sqrt{3} -15\sqrt{5} -14\sqrt{3} -28\sqrt{5} +6\sqrt{3} +12\sqrt{5} \\=12\sqrt{3} -31\sqrt{5}$