Question

rapid va rog...............

Answer 1

Răspuns:

Explicație pas cu pas:

E(x)=4x²+12x+9-2(x²+2x-3)+(9-x²)-44=4x²+12x+9-2x²-4x+6+9-x²-44

=x²+8x+24-44=x²+8x-20

x²+8x-20=0

x1,2=-4±√16+20=-4±6       x1=-10     x2=2

E(2)=0⇒

E(2)E(3)E(4)...................E(2020)=0