7b
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35ab squared
-5ab + 7ab -9ab + ab -2ab ... Let's simplify that a bit:ab(-5+7-9+1-2) = -8ab
21a2b2 square cm
To simplify the expression 12ab + 9ab - 7ab, you first combine like terms. The coefficients of the like terms are added or subtracted, while the variables remain the same. In this case, you add the coefficients of the like terms: 12 + 9 - 7 = 14. So, the simplified expression is 14ab.
256 divided by 2 divided by 2