Question

$( \frac{2}{ \sqrt{10} }+ \frac{1}{ \sqrt{5} }- \frac{1}{ \sqrt{2} }): \frac{2}{ \sqrt{2} }$

Answer 1

(2/√10+1/√5-1/√2)÷2/√2=
facem mai intai paranteza  si gasim numitorul comun  si este √10⇒ si amplificam prima cu √1.,a doua cu √2 si a a treia cu √5
2+√2-√5/√10)÷2/√2=

2+√2-√5/√10×√2/2=
se fac simplificari
√2-√5/√5