B. Use columns to simplify each difference.
1. (5x+9) - (2x + 1)
2. (3x-2y) - (5x + 4y)
3. (ab-4) - (3ab-6)
4. (-11a² + 2a-1) - (7a² + 4a)
5. (2x² + 3x-7) - (x² - 6x-9)
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1. (5x+9) - (2x + 1)
2. (3x-2y) - (5x + 4y)
3. (ab-4) - (3ab-6)
4. (-11a² + 2a-1) - (7a² + 4a)
5. (2x² + 3x-7) - (x² - 6x-9)
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Answer:
1. 3x + 8
2. -2x - 6y
3. -2ab + 2
4. -18a² - 2a - 1
5. x² + 9x + 2
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