thực hiện phép chia a,[15.(x-y)^3+12.(y-x)^2-x+y]:(3y-3x) b,[5.(x-2y)^4+(x-2y)^2+2y-x]:(x-2y) c,[6.(x+y)^3-5.(x+y)^2+3.(x+y)]:(x+y)

Đáp án + Giải thích các bước giải:

`a,[15.(x-y)^3+12.(y-x)^2-x+y]:(3y-3x)`

`=[15.(x-y)^3 + 12.(x - y)^2-(x- y)]: [-3(x - y)]`

`=15.(x-y)^3 : [-3(x - y)] + 12.(x - y)^2 : [-3(x - y)] - (x- y) : [-3(x - y)]`

`=-5(x - y)^2 - 4(x - y) + 1/3`

`b),[5.(x-2y)^4+(x-2y)^2+2y-x]:(x-2y)`

`=,[5.(x-2y)^4+(x-2y)^2- (x - 2y)]:(x-2y)`

`=5.(x-2y)^4 :(x-2y) + (x-2y)^2 :(x-2y) - (x - 2y) : (x-2y)`

`=5(x - 2y)^3 + (x - 2y) - 1`

`c,[6.(x+y)^3-5.(x+y)^2+3.(x+y)]:(x+y)`

`=6.(x+y)^3 :(x+y) -5.(x+y)^2 :(x+y) +3.(x+y ): (x+y)`

`=6(x + y)^2 - 5(x  y) + 3`