Question

Me ajudem ai please preciso pra amanhã

Answer 1

a)$\frac{ \sqrt{2}. \sqrt{40} }{ \sqrt{5}. \sqrt{8} }=$

  $\frac{ \sqrt{80} }{ \sqrt{40} }= \sqrt{2}=1,41$

c) $\sqrt{2 \sqrt{2} \sqrt{2} }= \sqrt{2. \sqrt{4} }= \sqrt{2.2}= \sqrt{4}=2$

b)$5 \sqrt{24}-4 \sqrt{54} =$

$5 \sqrt{2^3.3}-4 \sqrt{3^3.2}=5.2 \sqrt{6}-4.3 \sqrt{6}=10 \sqrt{6} -12 \sqrt{6}=-2 \sqrt{6}$