Question

Câu 4,5,6,7,8,11,15 giúp mình với ạ

Answer 1

4: \(=7-\sqrt{48}-\sqrt{48}+6=13-2\sqrt{48}\)

5: \(=50-\sqrt{7}-48+\sqrt{7}=2\)

6: \(=\sqrt{5}+1+\sqrt{5}-1=2\sqrt{5}\)

7: \(=\sqrt{5}-2+\sqrt{7}-\sqrt{5}=-2+\sqrt{7}\)