a) \(x^5+x+1\)
\(\Leftrightarrow x^5+x^4+x^3+x^2+x+1-x^4-x^3-x^2\)
\(\Leftrightarrow x^3\left(x^2+x+1\right)+x^2+x+1-x^2\left(x^2+x+1\right)\)
\(\Leftrightarrow\left(x^2+x+1\right)\left(x^3+1-x^2\right)\)
b) \(x^8+x^7+1\)
\(\Leftrightarrow x^8+x^7+x^6+x^5+x^4+x^3+x^2+x+1-x^6-x^5-x^4-x^3-x^2-x\)
\(\Leftrightarrow x^6\left(x^2+x+1\right)+x^5\left(x^2+x+1\right)+x^2+x+1-x^4\left(x^2+x+1\right)-x\left(x^2+x+1\right)\)
\(\Leftrightarrow\left(x^2+x+1\right)\left(x^6+x^5+1-x^4-x\right)\)
Mệt ồi ,mấy câu kia tương tự
Mk nhớ ko nhầm thì những câu này mk đã giải hết cho bn r mà?
