Question

bài 4 câu a

Answer 1

4:

a: \(=\dfrac{4+2\sqrt{3}}{2+\sqrt{3}+1}+\dfrac{4-2\sqrt{3}}{2-\sqrt{3}+1}\)

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

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