Phan tích đa thức thanh nhan tu
a)4x^2-y^2+8.(x-2)
b)xy+1-x-y
c)x^3-2x^2+2x-4
d) x^2+ab+x+bx
f)xy-4+2x-2y
g) ã+bx -cx +a+b-c
Phan tích đa thức thanh nhan tu
a)4x^2-y^2+8.(x-2)
b)xy+1-x-y
c)x^3-2x^2+2x-4
d) x^2+ab+x+bx
f)xy-4+2x-2y
g) ã+bx -cx +a+b-c
a, ` 4x^2-y^2+8.(x-2) `
Ko pt đc bạn
b)xy+1-x-y
= x ( y – 1 ) – ( y – 1 )
= (x – 1 )(y – 1 )
c)`x^3-2x^2+2x-4`
` = x^2 ( x – 2 ) + 2(x-2)`
` = ( x^2 + 2 )(x – 2 )`
d) Hơi sai sai
f)xy-4+2x-2y
= x ( y + 2 ) – 2 ( 2 + y )
= ( x – 2)(y + 2 )
g)
Hơi sai sai :(((
` x^2-4xy+4y^2 -4 `
` = ( x – 2y)^2 – 4 `
` = ( x – 2y + 2 )(x – 2y – 2 )`
`16-x^2+2xy-y^2`
2x chuyển thành 2xy chứ bạn>?
= ` 16 – ( x – y )^2`
` = ( 4 – x + y)(4 + x – y)`