Question

x^4 +1997x^2 +1996x+1997

phan tich da thuc thanh nhan tu

Answer 1

\(x^4+1997x^2+1996x+1997=x^4+1997x^2+1997x-x+1997=\left(x^4-x\right)+1997\left(x^2+x+1\right)=x\left(x-1\right)\left(x^2+x+1\right)+1997\left(x^2+x+1\right)=\left(x^2-x+1997\right)\left(x^2+x+1\right)\)