IV. Perform the indicated operation
1. x² + 7x + 12 by x + 4
2. (3x + 8x - 35) = (x + 5)
3. (X + 8)(x - 8)
4. (2a + 3b - 4) + (a - 2b + 3)
5. (5a - 3b + 4c)​