Question

subtract ;-3m2+6m+3 from 5m2-9​

Answer 1

Answer:

$= 8 {m}^{2} - 6m - 12$

Step-by-step explanation:

$= (5 {m}^{2} - 9) - ( - 3 {m}^{2} + 6m + 3)$

$= 5 {m}^{2} - 9 + 3 {m}^{2} - 6m - 3$

$= 8 {m}^{2} - 6m - 12$

Hope it helps you..!

Answer 2

Answer:

2m^2 - 12 - 6m

Step-by-step explanation:

(5m^2 -9)  - (3m^2 + 6m +3)

5m^2 - 3m^2 - 9 - 3 - 0 - 6m [Signs change in subtraction]

2m^2 - 12 - 6m

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