Question

1. ab  ( x - 3 ) - a bình ( x - 3 )

2 . ax + ay + bx + by

3. ax + ay - 2x - 2y

4. 2x - 2y + ax - ay

5. 10ax - 5ay - 2x + y

mình cảm ơn trước ạ

Answer 1

`ab(x-3) -a^2(x-3)`

`=(x-3)(a^2-ab)`

__

`ax+ay+bx+by`

`=a(x+y)+b(x+y)`

`=(x+y)(a+b)`

__

`ax+ay -2x-2y`

`=(ax+ay)-(2x+2y)`

`=a(x+y)-2(x+y)`

`=(x+y)(a-2_`

__

`2x-2y +ax-ay`

`=2(x-y)+a(x-y)`

`=(x-y)(2+a)`

__

`10ax -5ay -2x+y`

`= 5a(2x-y) -(2x-y)`

`=(2x-y)(5a-1)`

Answer 2

1: =(x-3)(ab-a^2)

=a(b-a)(x-3)

2: =a(x+y)+b(x+y)

=(x+y)(a+b)

3: =a(x+y)-2(x+y)

=(x+y)(a-2)

4: =2(x-y)+a(x-y)

=(x-y)(a+2)

5: =5a(2x-y)-(2x-y)

=(2x-y)(5a-1)

Answer 3

1) \(ab\left(x-3\right)-a^2\left(x-3\right)=a\left(x-3\right)\left(b-a\right)\)

2) \(ax+ay+bx+by=\left(a+b\right)\left(x+y\right)\)

3) \(ax+ay-2x-2y=\left(a-2\right)\left(x+y\right)\)

4) \(2x-2y+ax-ay=\left(2+a\right)\left(x-y\right)\)

5) \(10ax-5ay-2x+y=5a\left(2x-y\right)-\left(2x-y\right)=\left(5a-1\right)\left(x-y\right)\)

Answer 4

1. \(ab\left(x-3\right)-a^2\left(x-3\right)\)

⇔ \(a\left(x-3\right)+\left(b-a\right)\)

2. \(ax+ay+bx+by\)

⇔ \(a\left(x+y\right)+b\left(x+y\right)\)

⇔ \(\left(x+y\right)\left(a+b\right)\)

3. \(ax+ay-2x-2y\)

⇔ \(a\left(x+y\right)-2\left(x+y\right)\)

⇔ \(\left(x+y\right)\left(a-2\right)\)

4. \(2x-2y+ax-ay\)

⇔ \(2\left(x-y\right)+a\left(x-y\right)\)

⇔ \(\left(x-y\right)\left(2+a\right)\)

5. \(10ax-5ay-2x+y\)

⇔ \(\left(10ax-2x\right)+\left(-5ay+y\right)\)

⇔ \(2x\left(5a-1\right)+y\left(-5a+1\right)\)

^{Tự nhiên tới đây quên mất cách giải, thông cảm.}