SUMA Y RESTA DE POLIMONIOS

1. (7x²+2)-(3x²-5)=

 7x²+2-3x²+5

 7-3=4x²

2+5=7

R=4x²+7

2. (8x²-x)-(7x²+3x)=

 8x²-x-7x²-3x

 8-7=1x²

-1-3=-4x

R=1x²-4x

3. ( 3x²-2x-1)-(4x²+2x+5)=

 3x²-2x-1-4x²-2x-5

 3-4=-1x²

 -2-2=-4x

-1-5=-6

R=-1x²-4x-6

4. (-3x+x²-1)-(5x+1-3x²)=

 -3x+x²-1-5x-1+3x²

1+3=4x²

-3-5=-8x

-1+1=0

R= 4x²-8x+0                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

5. (-1+7x²-2x)-(5x+3x²-7)

-1+7x²-2x-5x-3x²+7

 7-3=4x²

 -2-5=-7x

-1+7=6

R= 4x²-7x+6

6. (7x³-x²+x-1)-(2x²+3x+6)=

 7x³-x²+x-1-2x²-3x-6

 7x³

-1-2=-3x²

1-3=-2x

-1-6=-7

R=7x³-3x²-2x-7

7. (5x²-2x+5)-(3x³-x²+5)=

  5x²-2x+5-3x³+x²-5

  -3x³

  5+1=6x²

 -2x

 5-5=0

R=-3x+6x²-2x+0

8. (3x²-x-7)-(5x³+5-x²+2x)=

 3x²-x-7-5x³-5+x²-2x

 -5x³

  3+1=4x²

 -1-2=-3x

-7-5=-12     

R=-5x³+4x²-3x-12

9. (6x³-2x²-3x+1)-(-x³-x²-5x+7)=

  6x³-2x²-3x+1+x³+x²+5x-7

  6+1=7x³

  -2+1=-1x²

 -3+5=2x

 1-7=-6

R=7x³-1x²+2x-6

10. ( x-3x²+x³+9)-(-8+7x-x²+x³)=

 x-3x²+x³+9+8-7x+x²-x³

1-1=0x³

 -3+1=-2x²

 1-7=-6x

 9+8=17

R= 0x³-2x²-6x+17