Question

Tính giá trị biểu thức: 

\(A=\sqrt{8}+\sqrt{18}-\sqrt{32}\)

\(B=2\sqrt{9}+3\sqrt{36}-\sqrt{64}\)

Answer 1

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

B=6+18-8=16

Answer 2

\(A=2\sqrt{2}+3\sqrt{2}-4\sqrt{2}=\sqrt{2}\\ B=2\cdot3+3\cdot6-8=6+18-8=16\)

Answer 3

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

=\(\sqrt{2}\)

Answer 4

b= 2.3 + 3.4\(\sqrt{2}\)-\(6\sqrt{2}\)

= 3+( 12-6)\(\sqrt{2}\)

= 3+ 6\(\sqrt{2}\)

Answer 5

A=2√2+3√2−4√2=√2

B=2⋅3+3⋅6−8=6+18−8=16