Đáp án+Giải thích các bước giải:
`1) y(x+1)-(1+x)(2y-1)`
`=(x+1)(y-2y+1)`
`=(x+1)(1-y)`
`2) (2x-3)(3y-2)+(3-2x)(y+1)`
`=(2x-3)(3y-2)-(2x-3)(y+1)`
`=(2x-3)(3y-2-y-1)`
`=(2x-3)(2y-3)`
`3) 2y^3(x-3)+4y^2(3-x)`
`=2y^3(x-3)-4y^2(x-3)`
`=2y^2(x-3)(y-2)`
`4) 9-6x^2+x^4`
`=(x^2)^2-2*x^2*3+3^2`
`=(x^2-3)^2`
`=[(x-sqrt(3))(x+sqrt(3))]^2`
`=(x-sqrt(3))^2(x+sqrt(3))^2`
`5) 4x^2-12xy+9y^2`
`=(2x)^2-2*(2x)*(3y)+(3y)^2`
`=(2x-3y)^2`
`6) x^2-4y^2`
`=x^2-(2y)^2`
`=(x-2y)(x+2y)`
`text{xin 5 sao và hay nhất nha}`
