Question

pls answer fast and correct ​

Answer 1

Answer:

0

Step-by-step explanation:

-ab+2ab-ab

(-ab-ab) +2ab

-2ab+2ab

0

Answer 2

Answer:

0

Step-by-step explanation:

-ab+2ab-ab

={-ab+(-ab)}+2ab

=(-ab-ab)+2ab

=-2ab+2ab

=0

Hope this helps. Please mark this answer as the brainliest answer.