giải pt

\(\sqrt{49x-98}-14\sqrt{\dfrac{x-2}{49}}=\sqrt{9x-18}+8\)

P=\(\left(\dfrac{\sqrt{x}}{\sqrt{x}+1}-\dfrac{1}{x-\sqrt{x}}\right).\left(\dfrac{1}{\sqrt{x}+1}+\dfrac{1}{\sqrt{x}-1}\right)\)

rút gọn P

Cho biểu thức: P=\(\left(\dfrac{\sqrt{x}}{\sqrt{x}+1}-\dfrac{1}{x-\sqrt{x}}\right).\left(\dfrac{1}{\sqrt{x}+1}+\dfrac{1}{\sqrt{x-1}}\right)\)

rút gọn P

C=\(\dfrac{x}{x-\sqrt{x}}+\dfrac{2}{x+2\sqrt{x}}+\dfrac{x+2}{\left(\sqrt{x}-1\right)\left(x+2\sqrt{x}\right)}\)

rút gọn C

C=$\frac{\mathrm{\backslash (\backslash dfrac\{x\}\{x-\backslash sqrt\{x\}\}+\backslash dfrac\{2\}\{x+2\backslash sqrt\{x\}\}+\backslash dfrac\{x+2\}\{\backslash left(\backslash sqrt\{x\}-1\backslash right)\backslash left(x+2\backslash sqrt\{x\}\backslash right)\}\backslash )}}{}$

rút gọn C

C=\(\dfrac{x}{x-\sqrt{x}}+\dfrac{2}{x+2\sqrt{x}}+\dfrac{x+2}{\left(\sqrt{x}+1\right)\left(x+2\sqrt{x}\right)}\)

rút gọn C

Q= \(\sqrt{x}\left(\dfrac{\sqrt{x}+1}{x+\sqrt{x}+1}+\dfrac{1}{1-\sqrt{x}}+\dfrac{x+2}{x\sqrt{x}-1}\right)\)

a. Rút gọn Q

b. So sánh \(\dfrac{1}{Q}xvới3\sqrt{x}\)