E(x)=(x+2)(x²+4x+4)-x-2/x(x+5)+6
=(x+2)×(x²+4x+4)-(x-2)/x(x+5)+6
=(x+2)(x²+4x+4-1)/x²+3x+2x+6
=(x+2)(x²+3x+x+3)/x•(x+3)+2(x+3)
=(x+2)[x(x+3)+x+3]/(x+3)(x+2)
=(x+3)(x+1)/(x+3)Se simplifica (x+3) cel de sus cu cel de jos
=x+1
