Mathematics, 03.02.2020 06:47 mixcolin0002

Ineed these done before 2 pm!

9. (7a + 6b – 9c) – (3a – 6c)
10. (x2 – 9) – (-2x2 + 5x – 3)
11. (5 – 6d – d2) – (-4d – d2)
12. (-4x + 7) – (3x – 7)
13. (4a – 3b) – (5a – 2b)
14. (2c + 3d) – (-6d – 5c)
15. (5x2 + 6x – 9) – (x2 – 3x +7)
16. (3y – 6) – (8 – 9y)
17. (3a2 – 2ab + 3b2) - (-a2 – 5ab + 3b2)
18. 5c – [8c – (6 – 3c)]
19. 10x + [3x – (5x – 4)]
20. 3x 2 – [7x- (4x – x2) + 3]
21. x2 – [ - 3x+ ( 4 – 7x)]

Answers: 1

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Ineed these done before 2 pm!

9. (7a + 6b – 9c) – (3a – 6c)
10. (x2 – 9) – (-2x2...