Question

Phan tich da thuc thanh nhan tu :

1) x^4 + x^3 +x + 1

2) x^3 + 3x^2+ 3x +1 -8y^3

Cac ban ghi loi giai ro rang cho minh nha.thanks

Answer 1

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

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

2) \(=\left(x+1\right)^3-\left(2y\right)^3=\left(x+1-2y\right)\left[\left(x+1\right)^2+\left(x+1\right).2y+4y^2\right]\)

\(=\left(x-2y+1\right)\left(x^2+2x+1+2xy+2y+4y^2\right)\)Đến đây bạn phân tích tiếp nha

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