Sagot :
Answer:
7m² + 17m -2
Step-by-step explanation:
(3m² - 4m + 12)+(m-9)
= 3m² - 3m + 3
(10m² + 20m -5)-(3m² - 3m + 3)
= 7m² + 17m -2
Answer:
7m² + 17m -2
Step-by-step explanation:
(3m² - 4m + 12)+(m-9)
= 3m² - 3m + 3
(10m² + 20m -5)-(3m² - 3m + 3)
= 7m² + 17m -2