Question

Cứu

Answer 1

a: \(=2\sqrt{2}+3\sqrt{2}-4\sqrt{2}=\sqrt{2}\)

b: \(=2\sqrt{5}+\sqrt{5}-1=3\sqrt{5}-1\)

c: \(=\dfrac{\sqrt{3}-1+\sqrt{3}+1}{2}-2\sqrt{3}=\sqrt{3}-2\sqrt{3}=-\sqrt{3}\)

d: =-căn 5

e: \(=\sqrt{3}-\sqrt{3}+1=1\)

k:=12-5*2=12-10=2