\(\left(5\sqrt{2}+2\sqrt{5}\right)\sqrt{5}-\sqrt{250}\)
\(=5\sqrt{10}+2.5-\sqrt{\left(25.10\right)}\)
\(=5\sqrt{10}+10-5\sqrt{10}\)
\(=10\)
Vậy : \(\left(5\sqrt{2}+2\sqrt{5}\right)\sqrt{5}-\sqrt{250}=10\)
(5√2+2√5)√5−√250
=5√10+2.5−√(25.10)
=5√10+10−5√10
=10
Vậy : (5√2+2√5)√5−√250=10