Question

1.(-2b²+9b+3)+(-b+4)
2.(6x²-x-6)-(4x²-9x-9)
3.(-5b²-4b+6)+(6b²+9b-5)
4.(7c²+4c+8)+(5c²+2c+2)
5.(7d²+4d+7)+(3d²+4d-6)
6.(-6q²-2q+6)+(-4q²+2q+8)
7.(-7g²+2g-5)+(3g²-3g+7)
8.(-6s²+2s-1)-(5s²+6s-3)
9.(-4s²-7s-7)+(6s²-s+1)
10.(2c²-5c+1)+(9c²+8c-5)

Answer 1

1.-2b² + 9b + 3 - b + 4 = -2b² + 8b + 7

2.6x² - x - 6 - (4x² - 9x - 9) = 6x² - x - 6 - 4x² + 9x + 9 = 2x² + 8x + 3

3.-5b² - 4b + 6 + 6b² + 9b - 5 = (6b² - 5b²) + (9b - 4b) + (6 - 5) = b² + 5b + 1

4.7c² + 4c + 8 + 5c² + 2c + 2 = (7c² + 5c²) + (4c + 2c) + (8 + 2) = 12c² + 6c + 10

5.7d² + 4d + 7 + 3d² + 4d - 6 = (7d² + 3d²) + (4d + 4d) + (7 - 6) = 10d² + 8d + 1

6.-6q² - 2q + 6 - 4q² + 2q + 8 = (-6q² - 4q²) + (-2q + 2q) + (6 + 8) = -10q² + 14

7.-7g² + 2g - 5 + 3g² - 3g + 7 = (-7g² + 3g²) + (2g - 3g) + (-5 + 7) = -4g² - g + 2

8.-6s² + 2s - 1 - (5s² + 6s - 3) = -6s² + 2s - 1 - 5s² - 6s + 3 = -11s² - 4s + 2

9.-4s² - 7s - 7 + 6s² - s + 1 = (-4s² + 6s²) + (-7s - s) + (-7 + 1) = 2s² - 8s - 6

10.2c² - 5c + 1 + 9c² + 8c - 5 = (2c² + 9c²) + (-5c + 8c) + (1 - 5) = 11c² + 3c - 4