by danc Tue Dec 02, 2014 6:25 pm
Question about combining the terms in the denominator. After we get the common denominator, we have to subtract the numerators. Do we always assume parenthesis around a fraction's numerator when subtracting fractions like this? It seems like we do, otherwise it would be 1-x-1=-x rather than 2-x. So, when we are subtracting fractions, do we always assume there are parenthesis around the numerators?