Question

x⁵ +x-1

Answer 1

\(x^5+x-1\)

\(\text{ Phân tích thành nhân tử}\)

\(\left(x^2-x+1\right)\left(x^3+x^2-1\right)\)

nhé bạn 

Answer 2

\(x^5+x-1=x^5-x^4+x^3+x^4-x^3+x^2-x^2+x-1\)

\(=x^3\left(x^2-x+1\right)+x^2\left(x^2-x+1\right)-\left(x^2-x+1\right)\)

\(=\left(x^2-x+1\right)\left(x^3+x^2-1\right)\)