1) 2a + 4b - 6c 2) -4a - 8d - 12c 3) -5x - 10xy - 15y 4) 8xy - 24y + 16x 5) 9ab - 18a^2 + 9a 6) 2axy - 4a^2xy^2 + 6a^3x^2 7) 5x^2xy - 10a^3x - 15ax

Đáp án:

↓↓

Giải thích các bước giải:

`1)`

`2a + 4b +6c `

`= 2( a+2b+3c)`

`2)`

`-4a - 8d - 12c `

`= -4(a+2d+3c)`

`3)`

`-5x - 10xy - 15y`

`= -5 (x+2xy+3)`

`4)`

`8xy - 24y +16x `

`= 8 ( xy - 3y + 2x)`

`5)`

`9ab - 18a^2 +9a `

`= 9a (b-2a+1)`

`6) `

`2axy - 4a^2xy^2 + 6a^3x^2 `

`= 2ax ( y - 2ay +3 a^2x)`

`7)`

`5x ^2xy - 10a^3x - 15ax`

`= 5x ( x^2y-2a^2-3a).`

Đáp án:

Giải thích các bước giải:

1) 2a + 4b +6c = 2( a+2b+3c)

2) -4a - 8d - 12c = -4(a+2d+3c)

3) -5x - 10xy - 15y = -5 (x+2xy+3)

4) 8xy - 24y +16x = 8 ( xy - 3y + 2x)

5) 9ab - 18a^2 +9a = 9a (b-2a+1)

6) 2axy - 4a^2xy^2 + 6a^3x^2 = 2ax ( y - 2ay +3 a^2x)

7) 5x ^2xy - 10a^3x - 15ax= 5x ( x^2y-2a^2-3a)