Răspunsuri

Cel mai inteligent răspuns!
2014-05-21T17:35:28+03:00
1) (x²+2x)/(x²-4)
 x²-4=(x+2)(x-2)
 x²+2x=x(x+2)
=>x(x+2)/(x+2)(x-2)=x/x-2

2)(x+1)/(x-2)+ (3-2x)/(5x-10) |amplificam prima fractie cu 5
   [5(x+1)+3-2x]/(5x-10)=(5x+5+3-2x)/(5x-10)=(3x+8)/(5x-10)
2 5 2