Question

(x^5)+(x^4)+1将这个式子因式分解

Answer 1

(x^5)+(x^4)+1

=(x^5)+(x^4)+x^3-x^3+1

=x^3(x^2+x+1)+(1-x)(x^2+x+1)

=(x^2+x+1)(x^3-x+1)