sắp nộp r, help mik vs

1, a+b+x(a+b)

2, ax-bx+cx-3a+3b-3c

3, 2ax-5x+3cx-2a+b-3c

4, ax-bx-2cx-2a+2b+4c

5, x^2-5x-24=0

cíu!!!!

1, 10ax-5ax-5ay+2x-y

2, 5x^2y+5xy^2-a^2x+a^2y

3, 6a^2y-3aby+4a^2x-2abx

4, 10ay^2-5by^2+2a^2x-ab

5, ax^2-3axy+bx+3by

6, a^2x-5by-5a^2y+2bx

7, 3a^2x-3a^2y+abx-aby

giúp mik vs, mik sắp nộp r

11, ax^2y-bx^2y-ax+bx+2a-2b

12, 3ax^2+3bx^2+ax+bx+5a+5b

13, ax^2 -bx^2-2ax+2bx-3a+3b

14, 2ax^2-bx^2-2ax+bx+4a-2b

15, ax^2-5x^2-ax+5x+a-5

* Tìm x biết

1, x^2-7x=0

2, -3x^2+5x=0

3, x^2+3x-2x-6=0

4, x^2+6x-x-6=0

5, x^2+2x-3x-6=0

6, x^2-4x+5x-20=0

7, x^2+4x-5x-20=0

8, x^2-10x+2x-20=0

9, x^2+10x-2x-20=0

10, x^2-20x+x-20=0

11, x^2+20x-x-20=0

12, x^2+12x+2x+24=0

13, x^2-12x-2x+24=0

14, x^2+6x+4x+24=0

15, x^2-6x-4x+24=0

16, x^2+8x+3x+24=0

17, x^2-8x-3x+24=0

18, x^2+8x-3x-24=0

19, x^2-8x+3x-24=0

20, x^2-5x-24=0

help mik, mai nộp r

1, 10ax-5ay-2x+y

2, 5x^2y+5xy^2-a^2x+a^2y

3, 6a^2-3aby+4a^2x-2abx

4, 2x^2-6xy+5x-15y

5, 10ay^2-5by^2+2a^2x-ab

6, ax^2-3axy+3x-3by

7, 2a^2x-5by-5a^2y+12bx

8, 3a^2x-3a^2y+abx-aby

9, 4acx+4bcx+4ax+4bx

10, 2ax^3+6ax^2+6ax+18a

11, ax^2y-bx^2y-ax+bx+2a-2b

12, 3ax^2+3bx^2+ax+bx+5a+5b

13, ax^2 -bx^2-2ax+2bx-3a+3b

14, 2ax^2-bx^2-2ax+bx+4a-2b

15, ax^2-5x^2-ax+5x+a-5

16, ax-bx+cx-3a+3b-3c

17, 2ax-bx+3cx-2a+b-3c

18, ax-bx-2cx-2a+2b+4c