Little foggy on this ...How do u approach it? (a-b) * ((a-c)/2b)
When multiplying fractions by any number, you multiply the number with the numerator of the fraction.
So here our 'number' is (a-b), and then (a-b) * ((a-c)/2b) would be:
the equation is (a-b) ((a-c)/2b)....and the final answer is (a+c)/2...How do we get here?
There is absolutely no point in reposting the same question.
You have been told that the must be a typo some where.
It is impossible to derive that answer from that expression. Is there more to the problem that you have told us?
I even tried messing around with the parentheses, and it just dont make any sense, so there indeed must be a typo somewhere. Please post the whole question