Решите уравнения:
а)[tex] \frac{ x^{2} -3x+2}{x-2} [/tex]
б) [tex] \frac{5}{ x^{2} +2x+1} = \frac{2}{1-x} + \frac{1}{x-1} [/tex]
в)[tex] \frac{3}{ x^{2} -6x+9} = \frac{1}{x+3} - \frac{6}{9- x^{2} } [/tex]