Question

Answer 1

2:

a: =7căn 2+5căn 2-4căn +3căn 2=11căn 2

b: =căn 15+2căn 15+2căn 35+2căn 21

=3căn 15+2căn 35+2căn 21

c: \(=2\sqrt{3}-5\sqrt{3}+4\sqrt{3}-7\sqrt{3}=-6\sqrt{3}\)

d: \(=-10\sqrt{2}+3\sqrt{2}-12\sqrt{2}+6\sqrt{2}=-13\sqrt{2}\)

e: \(=\sqrt{5}-3\sqrt{5}+15\sqrt{3}-4\sqrt{3}=-2\sqrt{5}+11\sqrt{3}\)

f: \(=2\sqrt{3}+4\sqrt{3}-5\sqrt{3}-9\sqrt{3}=-8\sqrt{3}\)

g: \(=5\sqrt{2}-3\sqrt{2}+10\sqrt{2}-9\sqrt{2}=3\sqrt{2}\)

h: \(=15\sqrt{5}-4\sqrt{5}-20\sqrt{5}+15\sqrt{5}=6\sqrt{5}\)