Cho P =\(\frac{2\sqrt{x}}{\sqrt{x}+3}\) +\(\frac{\sqrt{x}}{\sqrt{x}-3}\)-\(\frac{3x+3}{x-9}\)
Q =\(\frac{\sqrt{x}+1}{\sqrt{x}-3}\)( x \(\ge\)0 ; x \(\ne\)9 )
M =\(\frac{P}{Q}\)( P = \(\frac{-3.\left(\sqrt{x}+1\right)}{\left(\sqrt{x}-3\right)\left(\sqrt{x}+3\right)}\)