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Mathematics, 21.07.2021 01:20 shay7298

For questions 4 – 9, find the sum or difference of the polynomials. Write your answer in descending order.
4. (9x2 + 3x - 2) + (3x2 – 5x -
5. (3x2 – 3x + 6) – (5x2 + 2x + 9)
6. (-3x2 + 2x + 1) + (-8x2 + 3x + 2)
7. (2x2 + 5x – 12) – (-4x2 + 2x+6)

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