Tinh:

a)\(\sqrt{10+2\sqrt{14}}.\sqrt{10+2\sqrt{14}}\)

b)\(\sqrt{7+\sqrt{12}}-\sqrt{7-\sqrt{12}}\)

Cho bthuc: \(A=\frac{1}{2\sqrt{x}-2}-\frac{1}{2\sqrt{x}+2}+\frac{\sqrt{x}}{1-x}\)

a) Rut gon A

b) Tim gia tri cua x de /A/ =\(\frac{1}{2}\)

c) Tim x nguyen de A co gia tri nguyen