Question

Rút gọn các biểu thức sau:

a. \(\sqrt{72}+\sqrt{4\dfrac{1}{2}}-\sqrt{32}-\sqrt{162}\)

b. \(\dfrac{1}{2}\sqrt{48}-2\sqrt{75}-\dfrac{\sqrt{33}}{\sqrt{11}}+5\sqrt{1\dfrac{1}{3}}\)

Answer 1

\(6\sqrt{2}+\dfrac{3\sqrt{2}}{2}-4\sqrt{2}-9\sqrt{2}\)

\(=\dfrac{\left(6+3-4-9\right)\sqrt{2}}{2}\)

=\(\dfrac{4\sqrt{2}}{2}=2\sqrt{2}\)

đây là ý a nha

 

Answer 2

\(=2\sqrt{3}-10\sqrt{3}-\sqrt{3}+\dfrac{10\sqrt{3}}{3}\)

=\(\dfrac{\left(2-10+10\right)\sqrt{3}}{3}=\dfrac{2\sqrt{3}}{3}\)

đây là ý b