Question

Решите плиз, дам 30 баллов

Answer 1

$1)4sqrt{2frac{7}{9} }-2=4sqrt{frac{25}{9}}-2=4*frac{5}{3}-2=frac{20}{3}-2=6frac{2}{3}-2=4frac{2}{3}\\2)frac{sqrt{125} }{sqrt{5} }=sqrt{frac{125}{5} }=sqrt{25}=5\\3)3sqrt{50}-sqrt{98} =3sqrt{25*2}-sqrt{49*2}=3*5sqrt{2}-7sqrt{2}=15sqrt{2}-7sqrt{2}=8sqrt{2}\\4)(sqrt{5}-sqrt{2})(sqrt{5}+sqrt{2})=(sqrt{5})^{2}-(sqrt{2})^{2}=5-2=3\\5)3sqrt{2}<sqrt{20}\\sqrt{9*2}<sqrt{20}\\sqrt{18}<sqrt{20}$

Answer 2

Там "-2" в первом примере потеряли.

Answer 3

Спасибо