Răspunsuri

2014-05-18T11:15:04+03:00
(x+3)²=x²+6x+9
⇒(x²+6x+9)/ (2x+4)=
(x²+3x+3x+3*3)/ (2x+4)= x(x+3)+3(x+3) totul supra 2x+4
=(x+3)(x+3)   / 2x+4