負數(2)

1. (4p{2}+6p-2)-(3+4p-2p{2})
= 8p+6p-2-3-4p+4p
= 8p+6p-4p+4p-2-3
= 14p-5

2. (-c+5c{2}-6)-8+2c{2}-3c)
= -c+10c-6-8-4c+3c
= -c+10c-4c+3c-6-8
= 8c-14

3.(-6-b+11b{2})-(b{2]+7-6b)
= -6-b+22b-2b-7+6b
= -b+22b-2b+6b-6-7
= 25b-13

4. (2y-2)-(2y{2}-6y+8)+(5y-7)
= 2y-2-4y+y-8+5y-7
= 2y-4y+y+5y-2-2+5
= 6y+1

5. (5y{2}-6y+3)+(-2y{2}+4y-8)
= 10y-6y+3-4y+4y-8
= 10y-6y-4y+4y+3-8
= 4y-5

6. (y-4Y{2}-9)+(2+7y-y{2})
= y-8y-9+2+7y-2y
= y-8y+7y-2y-9+2+7
= -2y+0

7. 12y{2}-y{3}+6y-8)+(5y{3}-6y+15)
= 24y-3y+6y-8+15y-6y+15
= 24y-3y+6y+15y-6y-8+15
= 36y+7

8. (3a-2b+4)+(2a+5b-2)
= 3a-2b+4+2a+5b-2
= 3a+2a-2b+5b+4-2
= 5a+3b+2

9. 3y{2}+4y-8)+(2y{2}-5y+3)
= 6y+4y-8+4y-5y+3
= 6y+4y+4y-5y-8+4+3
= 9y-1

10. (5y-y{2}-7)+(4y{2}-12y+3)
= 5y-2y-7+8y-12y+3
= 5y-2y+8y-12y-7+3
= -13y-4

11. (3a+4)+(-2a+7)
= 3a+4-2a+7
= 3a-2a+4+7
= a+11

12. (-3m-4n)+(2m+4n)
= -3m-4n+2m+4n
= -3m+2m-4n+4n
= m

13. (-4d+3d{2}+5)+(5d-8d{2})
= -4d+6d+5+5d-16d
= -4d+6d+5d-16d+5
= -9d+5

14. (2a-3b)+(4a+5b)+(a-2b)
= 2a-3b+4a+5b+a-2b
= 2a+4a+a-3b+5b-2b
= 7a

1) =6p^2+2p-5
2) =3c^2+2c-14
3) =10b^2+5b-13
4) =-2y^2+13y-17
5) =3y^2-2y-5
6) =-5y^2+8y-7
7) =4y^3+12y^2+7
8) =5a+3b+2
9) =5y^2-y-5
10)=3y^2-7y-4
11)=a+11
12)=-m
13)=-5d^2+d+5
14)=7a
例:4y^2=4y的二次方