Question

Bài2: Phân tích thành nhân tử

a) xy+y²-x-y

b) (xy-8)²-1

 

Answer 1

b: \(\left(xy-8\right)^2-1\)

\(=\left(xy-8\right)^2-1^2\)

\(=\left(xy-8-1\right)\left(xy-8+1\right)\)

=(xy-7)(xy-9)

a: \(xy+y^2-x-y\)

\(=y\left(x+y\right)-\left(x+y\right)\)

\(=\left(x+y\right)\left(y-1\right)\)

Answer 2

`#3107.10117`

Answer 3

2 a, xy + y^2 - x - y
= (xy + y^2 ) - (x + y)
= y( x + y ) - ( x + y )
= ( x + y ) ( y - 1 )