can someone help with these? im pretty sure the answer to the 2nd on is -72, but i just want to make sure

-144 and 72ab

Step-by-step explanation:

For the first one, you would just multiply everything left-to-right. -8 x 9 x 2 = -144. For the second one, since there are different variables, you can't combine them to get just a number. Multiply 3a by -6b to get -18ab, and then multiply that by -4 to get 72ab (the number is positive because when you multiply two negative numbers, you get a positive number).