What doexs this equal: 3ab-9ab+7ab
2 answers:
Answer:
I think that it equals 1ab. Because 3ab - 9ab= -6ab + 7ab= 1ab
So, this question tests wether or not you know how to combing "like terms".
Like terms are terms (thing inbetween +or-) that have the same variables.
Since all three terms contain "ab" we can add and subtract them.
So, 3ab-9ab = -6ab
-6ab+7ab=1ab
1ab is the correct answers
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