SOLUTION: Please help me solve this problem. subtract (xy-ab-9)-(xy-7ab-4)

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Question 147266: Please help me solve this problem.
subtract
(xy-ab-9)-(xy-7ab-4)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
%28xy-ab-9%29-%28xy-7ab-4%29 Start with the given expression.


xy-ab-9-xy%2B7ab%2B4 Distribute the negative.


6ab-5 Combine like terms