Question

In need help quick and can you also explain how you did or what I'm supposed to be doing

Answer 1

Answer:

heres a helpful stragity for your pos and neg numbers

-   -

 +   it's aupposed to be like a smiley face so lets say you had to solve -7+3 then you'd cover up the negitive and positive sign, so the answer would be a negitive number. It's a little stategy. And you should answer the question in the brackets then that answer times whatever you got.  

Answer 2

-45x+72
you multiply the 9 by everything in the parentheses