Question

PRECISO DE AJUDA, ME AJUDEM POR FAVOR!!!!!

Answer 1

$a)\\ \\ \sqrt{8} (\sqrt{8} +\sqrt{2} )=(\sqrt{8} )^{2} +\sqrt{8} .\sqrt{2} =8+\sqrt{16} =8+4=12$

$b)\\ \\ \sqrt{6} .(1-2\sqrt{6} )=\sqrt{6} -2(\sqrt{6} )^{2} =\sqrt{6} -2.6=\sqrt{6} -12$

$c)\\ \\ 4\sqrt{2} (\sqrt{8} +1)=4\sqrt{16} +1=4.4+1=16+1=17$

$d)\\ \\ (2+\sqrt{3} )(3+\sqrt{3} )=6+2\sqrt{3} +3\sqrt{3} +(\sqrt{3} )^{2} =\\ \\ 6+5\sqrt{3} +3=9+5\sqrt{3}$

$e)\\ \\ (3+\sqrt{2} )(1-\sqrt{2} )=3-3\sqrt{2} +\sqrt{2} -(\sqrt{2} )^{2} =\\ \\ 3-2\sqrt{2} -2=1-2\sqrt{2}$

$f)\\ \\ (5\sqrt{2} +4)(5\sqrt{2} -3)=(5\sqrt{2} )^{2} -15\sqrt{2} +20\sqrt{2} -12=\\ \\ 25.2+5\sqrt{2} -12=50+5\sqrt{2} -12=38+5\sqrt{2}$