Question

Va rog ajutați-mă repede dau coroana

Answer 1

Răspuns:

E(x)=[(x+2)^2 - (x-1)^2 + 9]/(x+2)(x-1) • -(x-1)/3

E(x)= -(x^2 + 4x + 4 - x^2 + 2x - 1 + 9)/3(x+2)

E(x)= -(6x+12)/3(x+2)

E(x)= -6(x+2)/3(x+2)

E(x)=(-2)