Phân tích đa thức thành nhân tử(x-y)-x³×(1-y)+y³(1-x) 06/07/2021 Bởi Skylar Phân tích đa thức thành nhân tử(x-y)-x³×(1-y)+y³(1-x)
Đáp án: Giải thích các bước giải: `(x-y)-x^3(1-y)+y^3(1-x)` `=x-y-x^3+x^3y+y^3-xy^3` `=(x-y)-(x^3-y^3)+xy(x^2-y^2)` `=(x-y)-(x-y)(x^2+xy+y^2)+xy(x-y)(x+y)` `=(x-y)(1-x^2-xy-y^2+x^2y+xy^2)` `=(x – y)[(xy^2 – y^2 – xy + y) + (x^2y – xy – x^2 + x) + (xy – y – x + 1)]` `=(x – y)[y(xy – y – x + 1) + x(xy – y – x + 1) + (xy – y – x + 1)]` `= (x – y)(x + y + 1)(xy – y – x + 1)` `= (x – y)(x + y + 1)[y(x – 1) – (x – 1)]` `= (x – y)(x + y + 1)(y – 1)(x – 1)` Bình luận
Đáp án: `(x – y) – x^3(1 – y) + y^3(1 – x)` `= (x – y )- x^3 + x^3y + y^3 – xy^3` `= (x – y) – (x^3 – y^3) + (x^3y – xy^3)` `= (x – y) – (x – y)(x^2 + xy + y^2) + xy(x^2 – y^2)` `= (x – y) – (x – y)(x^2 + xy + y^2) + xy(x – y)(x + y)` `= (x – y)[1 – (x^2 + xy + y^2) + xy(x + y)]` `= (x – y)(1 – x^2 – xy – y^2 + x^2y + xy^2)` `=(x – y)[(xy^2 – y^2 – xy + y) + (x^2y – xy – x^2 + x) + (xy – y – x + 1)]` `=(x – y)[y(xy – y – x + 1) + x(xy – y – x + 1) + (xy – y – x + 1)]` `= (x – y)(x + y + 1)(xy – y – x + 1)` `= (x – y)(x + y + 1)[y(x – 1) – (x – 1)]` `= (x – y)(x + y + 1)(y – 1)(x – 1)` Giải thích các bước giải: Bình luận
Đáp án:
Giải thích các bước giải:
`(x-y)-x^3(1-y)+y^3(1-x)`
`=x-y-x^3+x^3y+y^3-xy^3`
`=(x-y)-(x^3-y^3)+xy(x^2-y^2)`
`=(x-y)-(x-y)(x^2+xy+y^2)+xy(x-y)(x+y)`
`=(x-y)(1-x^2-xy-y^2+x^2y+xy^2)`
`=(x – y)[(xy^2 – y^2 – xy + y) + (x^2y – xy – x^2 + x) + (xy – y – x + 1)]`
`=(x – y)[y(xy – y – x + 1) + x(xy – y – x + 1) + (xy – y – x + 1)]`
`= (x – y)(x + y + 1)(xy – y – x + 1)`
`= (x – y)(x + y + 1)[y(x – 1) – (x – 1)]`
`= (x – y)(x + y + 1)(y – 1)(x – 1)`
Đáp án:
`(x – y) – x^3(1 – y) + y^3(1 – x)`
`= (x – y )- x^3 + x^3y + y^3 – xy^3`
`= (x – y) – (x^3 – y^3) + (x^3y – xy^3)`
`= (x – y) – (x – y)(x^2 + xy + y^2) + xy(x^2 – y^2)`
`= (x – y) – (x – y)(x^2 + xy + y^2) + xy(x – y)(x + y)`
`= (x – y)[1 – (x^2 + xy + y^2) + xy(x + y)]`
`= (x – y)(1 – x^2 – xy – y^2 + x^2y + xy^2)`
`=(x – y)[(xy^2 – y^2 – xy + y) + (x^2y – xy – x^2 + x) + (xy – y – x + 1)]`
`=(x – y)[y(xy – y – x + 1) + x(xy – y – x + 1) + (xy – y – x + 1)]`
`= (x – y)(x + y + 1)(xy – y – x + 1)`
`= (x – y)(x + y + 1)[y(x – 1) – (x – 1)]`
`= (x – y)(x + y + 1)(y – 1)(x – 1)`
Giải thích các bước giải: