Find the sum/difference of the following multinomials 1. (9-5ab + 6a) - (-12-3ab - 3a) 2. (m²-3m-5)+(m² + 10m - 8) 3. (-17x²y+11xy-2)+(-7x²y-11xy - 8)​

1. (9 − 5ab + 6a) − (−12 − 3ab − 3a) = 9 − 5ab + 6a + 12 + 3ab + 3a = (9 + 12) + (−5ab + 3ab) + (6a + 3a) = 21 − 2ab + 9a2. (m² − 3m − 5) + (m² + 10m − 8) = (m² + m²) + (−3m + 10m) + (−5 − 8) = 2m² + 7m − 133. (−17x²y + 11xy − 2) + (−7x²y − 11xy − 8) = (−17x²y − 7x²y) + (11xy − 11xy) + (−2 − 8) = −24x²y + 0xy − 10 = −24x²y − 10

Answered by Sefton | 2025-07-16