Răspuns:
E(0)×E(1)×0×.....×E(2020)=0
Explicație pas cu pas:
E(x)=(3x-1)²-7(x+1)(x-2)-(x+3)², unde x este numar real.
E(x)=9x²-6x+1-7(x²-x-2)-(x²+6x+9)
E(x)=9x²-6x+1-7x²+7x+14-x²-6x-9
E(x)= x²-5x+6
E(x)=x²-2x-3x+6
E(x)=x(x-2)-3(x-2)
E(x)=(x-2)(x-3)
E(2)=E(3)=0
=> E(0)×E(1)×0×.....×E(2020)=0
