Activity 1 Add the following polynomials.
1. -2a - 8b, 5a - 4b, 7a + 3b
2. 11e-71, -8e-2f, 5e + 3f
3. -1.7) + 2.4k, 3.6 - 1.2k
4. 12a"-3a + 21a-9, 8a* + 15a? - 7a + 28, 29a - 34a17a - 16
5. 4x-9y + 122, 12x - 9y - 212, -5x + 6y + 7z. pa answer po​