Simplificati raportul algebric pina la un raport inreductibil
[tex] \frac{a ^{2}-2ab+b ^{2} }{a ^{2} -b ^{2} } [/tex]

[tex] \frac{a ^{2-}ax }{x ^{2}-a ^{2} } [/tex]

[tex] \frac{ x^{2} -4}{2x- x^{2} } [/tex]