1/ (2x-1) (3x+2) (3-x) 2/ (2x ³-3x-1) (5x+2) 3/ (x+1) (x ²-x+1) 03/09/2021 Bởi Eden 1/ (2x-1) (3x+2) (3-x) 2/ (2x ³-3x-1) (5x+2) 3/ (x+1) (x ²-x+1)
`1) (2x-1) (3x+2) (3-x)` `= (2x-1) (-3x^2-7x+6)` `=-6x^3-11x^2+19x-6` `2) (2x ^³-3x-1) (5x+2)` `= 10 x^ 4 + 4 x^ 3 − 15 x^ 2 − 11 x − 2` `3) (x+1) (x ^²-x+1)` `=x^3+1` Bình luận
Đáp án: Giải thích các bước giải: `1, (2x-1) (3x+2) (3-x) ` `=(2x-1)(9x-3x^2+6-2x)` `= (2x-1)(-3x^2-7x+6)` `=-6x^3-14x^2+12x+3x^2+7x-6` `=-6x^3-11x^2+19x-6` `2,(2x³-3x-1) (5x+2) ` `= 10x^4-15x^2-5x+4x^3-6x-2` `=10x^4+4x^3-15x^2-11x-2` `3, (x+1) (x²-x+1) ` `= x^3 + 1` Bình luận
`1) (2x-1) (3x+2) (3-x)`
`= (2x-1) (-3x^2-7x+6)`
`=-6x^3-11x^2+19x-6`
`2) (2x ^³-3x-1) (5x+2)`
`= 10 x^ 4 + 4 x^ 3 − 15 x^ 2 − 11 x − 2`
`3) (x+1) (x ^²-x+1)`
`=x^3+1`
Đáp án:
Giải thích các bước giải:
`1, (2x-1) (3x+2) (3-x) `
`=(2x-1)(9x-3x^2+6-2x)`
`= (2x-1)(-3x^2-7x+6)`
`=-6x^3-14x^2+12x+3x^2+7x-6`
`=-6x^3-11x^2+19x-6`
`2,(2x³-3x-1) (5x+2) `
`= 10x^4-15x^2-5x+4x^3-6x-2`
`=10x^4+4x^3-15x^2-11x-2`
`3, (x+1) (x²-x+1) `
`= x^3 + 1`