Răspunsuri

2014-05-03T15:27:43+03:00
A) x²+2x+1+2x-14+1
x²+4x-12               (descompunem expresia)

(x+2)²-12-4
(x+2)²-16 ⇒ [(x+2)-4][(x+2)+4] ⇒ (x-2)(x+6)

b) E(-1)= (1-2)(1+6)
E(-1)= (-1)·7
E(-1)= -7

Sper ca te-am ajutat!