SUMA Y RESTA DE POLINOMIOS (adrian)

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