Răspunsuri

2014-02-13T16:07:22+02:00
(a-b)·(a+b)=a^{2} -b^{2}
Si tot asa,doar schimbi literele.
Iata alta: a (radical din 3) + a(radical din 3)= a(puterea 2)·3
2014-02-13T16:15:21+02:00
9y-20y+y=
x^2-2ab+5b
(x-2)(x+2)
3c-2a(x-2)-2ab
4x+12+3-6x+4/3