Question

Fie raportul E(x).....(POZA)

Answer 1

a) E(-1)==$(-1)^{2}$-4 supra$(-1)^{2}$-2(-1)=(1-4)supra(1+2)=-3supra 3=-1
b) E(x)=(x-2)(x+2)supra x(x-2)=(x+2)supra x