Question

Phân tích đa thức thành nhân tử :

a) xy(x+y)+yz(y+z)+xz(x+z)+2xyz

b) 2bx-3ay-bby+ax

c) 5ab-3bx+ax+5y

Answer 1

chỗ nào k hiểu hỏi mình lại ớ 

Answer 2

\(xy\left(x+y\right)+yz\left(y+z\right)+xz\left(x+z\right)+2xyz\)

\(=xy\left(x+y\right)+xyz+xz\left(x+z\right)+xyz+yz\left(y+z\right)\)

\(=xy\left(x+y+z\right)+xz\left(x+y+z\right)+yz\left(y+z\right)\)

\(=x\left(y+z\right)\left(x+y+z\right)+yz\left(y+z\right)\)

\(=x\left(y+z\right)\left(x+y+z+yz\right)\)