Explicație pas cu pas:
E(x)=x²+nx-2(n+2)=>
E(x)=x²+nx-2n-4 => E(x)=x²-4+n(x-2)=>E(x)=(x+2)(x-2)+n(x-2) =>E(x)=(x-2)(x+2+n)
n=2014 => E(x)=(x-2)(2016+x)
E(x)=x²-6x+8 => (x-2)(x+2+n)=(x-2)(x-4)=>x+2+n=x-4 =>
n+2=-4=>n= -6
