câu b) \(x=37-20\sqrt{3}nha\) mọi người.mình xin lổi
a: Sửa đề: \(A=\dfrac{x+2}{x\sqrt{x}-1}+\dfrac{\sqrt{x}}{x+\sqrt{x}+1}+\dfrac{1}{1-\sqrt{x}}\)
\(=\dfrac{x+2+x-\sqrt{x}-x-\sqrt{x}-1}{\left(\sqrt{x}-1\right)\left(x+\sqrt{x}+1\right)}\)
\(=\dfrac{x-2\sqrt{x}+1}{\left(\sqrt{x}-1\right)\left(x+\sqrt{x}+1\right)}=\dfrac{\sqrt{x}-1}{x+\sqrt{x}+1}\)
b: KHi x=37-20căn3 thì
\(B=\dfrac{5-2\sqrt{3}-1}{2}=\dfrac{4-2\sqrt{3}}{2}=2-\sqrt{3}\)