Rút gọn A

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

A=\(\dfrac{3\sqrt{x}-5}{2\sqrt{x}+1}\)

tính giá trị của biểu thức P khi x=\(\dfrac{3-2\sqrt{2}}{4}\)

rút gọn P

P=\(\left(2-\dfrac{\sqrt{X}-1}{2\sqrt{X}-3}\right):\left(\dfrac{6\sqrt{X}+1}{2X-\sqrt{X}-3}+\dfrac{\sqrt{X}}{\sqrt{X}+1}\right)\)

RÚT GỌN P:

P=\(\left(2+\dfrac{\sqrt{X}-1}{2\sqrt{X}-3}\right):\left(\dfrac{6\sqrt{X}+1}{2X-\sqrt{X}-3}+\dfrac{\sqrt{X}}{\sqrt{X}+1}\right)\)

GIẢI : 2X+3\(\sqrt{X}\)+1

Rút gọn 

A=\(\left(\dfrac{\sqrt{x}+1}{x-4}-\dfrac{\sqrt{x}-1}{x+4\sqrt{x}+4}\right).\dfrac{x\sqrt{x}+2x-4\sqrt{x}-8}{\sqrt{x}}\)

M=\(\left(\dfrac{1}{2+2\sqrt{a}}+\dfrac{1}{2-2\sqrt{a}}-\dfrac{a^2+1}{1-a^2}\right)\left(1+\dfrac{1}{a}\right)\)

CM rằng giá trị m ko phụ thuộc vào a

Rút gọn:

A=\(\left(\dfrac{2\sqrt{3}-\sqrt{6}}{\sqrt{8}-2}-\dfrac{\sqrt{216}}{3}\right).\dfrac{1}{\sqrt{6}}\)

B=\(\sqrt{9+4\sqrt{5}}+\sqrt{9-4\sqrt{5}}\)