SOLUTION: subtract:4a-7ab+3b+12 from 12a-9ab+5b-3

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Question 162255: subtract:4a-7ab+3b+12 from 12a-9ab+5b-3
Answer by tutor_paul(519) About Me  (Show Source):
You can put this solution on YOUR website!
I will rewrite the problem as follows:
%2812a-9ab%2B5b-3%29-%284a-7ab%2B3b%2B12%29
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Next, simplify by removing parentheses. Notice how that minus sign affects everything in the right set of parentheses. It is like multiplying each term by -1.
12a-9ab%2B5b-3-4a%2B7ab-3b-12
Now, just combine "like" terms and you are done:
highlight%288a-2ab%2B2b-15%29
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Good Luck,
tutor_paul@yahoo.com