Răspunsuri

2014-08-25T16:06:48+03:00
[(x-1)-5][(x-1)+5]= (x-1-5)(x-1+5)=  (x-6)(x+4)
3 4 3
2014-08-25T16:10:58+03:00
(x-1)²-25= (x-1)² - 5 (la 2)=(x-1-5)(x-1+5)=(x-6)(x+4)=x(la 2)+4x-6x-24=x(la 2)-2x-24 (Formula x(la 2)-y(la 2)=(x-y)(x+y)