CĐ->BĐ

1,have they painted the walls green ->

2,people belive that someone murdered mr stone ->

Cho bthuc

A=\(\left(\dfrac{1+a\sqrt{a}}{1+\sqrt{a}}-\sqrt{a}\right)-\dfrac{1+2\sqrt{a}+a}{\left(1-a\right)^2}+\sqrt{a}\) với a>0,a\(\ne\)1

a,Rg A

b,Tìm x để A=3

Cho bthuc 

A=\(\left(\dfrac{1+a\sqrt{a}}{1+\sqrt{a}}-\sqrt{a}\right)\dfrac{1+2\sqrt{a}+a}{\left(1-a\right)^2}+\sqrt{a}\)với a>0,a\(\ne\)1

a,Rg A

b,Tìm x để A=3

Cho bthuc

A=\(\left(\dfrac{\sqrt{x}}{\sqrt{x}+1}-\dfrac{x}{x-1}\right):\left(\dfrac{2x}{x-1}-\dfrac{\sqrt{x}}{\sqrt{x}-1}\right)với\) \(x\ge0,x\ne1\)

a,Rg A

b,Tìm x để A=2

giai ptr 

\(\sqrt{3x-6}-x=-2\)