[tex] \frac{x-4}{x-2} + \frac{x-2}{x-4} =[/tex]
amplifici prima cu (x-2) si a II-a cu (x-4)
[tex] \frac{ (x-4)^{2} }{(x-2)(x-4)} + \frac{ (x-2)^{2} }{(x-4)(x-2)} =[/tex]
[tex] \frac{ x^{2} -8x+16+ x^{2} -4x+4}{(x-2)(x-4)} = \frac{2 x^{2} -12x+20}{(x-2)(x-4)} = \frac{2( x^{2} -6x+10)}{(x-2)(x-4)} [/tex]
