(x ²-4x+4)-y ²= 16y ²-9x ²= 8x ³-y ³= 27x ³-8y ³= 27x ³+1= (x ²-2x+1)-9y ²= 16y ²-(x ²+6x+9)= 4x ²-25y ²= 02/07/2021 Bởi Reagan (x ²-4x+4)-y ²= 16y ²-9x ²= 8x ³-y ³= 27x ³-8y ³= 27x ³+1= (x ²-2x+1)-9y ²= 16y ²-(x ²+6x+9)= 4x ²-25y ²=
Đáp án: Bn tham khảo Giải thích các bước giải: * `(x^2 – 4x + 4) – y^2` `= (x – 2)^2 – y^2` `= (x – 2 – y)(x – 2 + y)` * `16y^2 – 9x^2` `= (4y)^2 – (3x)^2` `= (4y + 3x)(4y – 3x)` * `8x^3 – y^3` `= (2x)^3 – y^3` `= (2x – y)(4x^2 + 2xy + y^2)` * `27x^3 – 8y^3` `= (3x)^3 – (2y)^3` `= (3x – 2y)(9x^2 + 6xy + 4y^2)` * `27x^3 + 1` `= (3x)^3 + 1^3` `= (3x + 1)(9x^2 – 3x + 1)` * `(x^2 – 2x + 1) – 9y^2` `= (x – 1)^2 – (3y)^2` `= (x – 1 – 3y)(x – 1 + 3y)` * `16y^2 – (x^2 + 6x + 9)` `= (4y)^2 – (x + 3)^2` `= (4y – x – 3)(4y + x + 3)` * `4x^2 – 25y^2` `= (2x)^2 – (5y)^2` `= (2x – 5y)(2x + 5y)` Srudy well Bình luận
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Đáp án:
Bn tham khảo
Giải thích các bước giải:
* `(x^2 – 4x + 4) – y^2`
`= (x – 2)^2 – y^2`
`= (x – 2 – y)(x – 2 + y)`
* `16y^2 – 9x^2`
`= (4y)^2 – (3x)^2`
`= (4y + 3x)(4y – 3x)`
* `8x^3 – y^3`
`= (2x)^3 – y^3`
`= (2x – y)(4x^2 + 2xy + y^2)`
* `27x^3 – 8y^3`
`= (3x)^3 – (2y)^3`
`= (3x – 2y)(9x^2 + 6xy + 4y^2)`
* `27x^3 + 1`
`= (3x)^3 + 1^3`
`= (3x + 1)(9x^2 – 3x + 1)`
* `(x^2 – 2x + 1) – 9y^2`
`= (x – 1)^2 – (3y)^2`
`= (x – 1 – 3y)(x – 1 + 3y)`
* `16y^2 – (x^2 + 6x + 9)`
`= (4y)^2 – (x + 3)^2`
`= (4y – x – 3)(4y + x + 3)`
* `4x^2 – 25y^2`
`= (2x)^2 – (5y)^2`
`= (2x – 5y)(2x + 5y)`
Srudy well