Question

Tính ạ

Answer 1

\(=\dfrac{2+2\sqrt{3}-2+2\sqrt{3}}{\left(1-\sqrt{3}\right)\left(1+\sqrt{3}\right)}=\dfrac{4\sqrt{3}}{-2}=-2\sqrt{3}\)

Answer 2

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

\(=-1-\sqrt{3}+1-\sqrt{3}\)

\(=-2\sqrt{3}\)