Question

tính \(\sqrt{7-2\sqrt{12}}\) kết quả là 

a, \(7-2\sqrt[]{12}\)

b, \(2\sqrt{12}-7\)

c, 2-\(\sqrt{3}\)

d, \(\sqrt{3}-2\)

Answer 1

\(\sqrt{7-2\sqrt{12}}=\sqrt{\left(2-\sqrt{3}\right)^2}=\left|2-\sqrt{3}\right|=2-\sqrt{3}\)

=> Chọn C