SOLUTION: subtract expressions with like denominators as indicated 12/z-1 - 2z+4/z-1

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Question 212946: subtract expressions with like denominators as indicated
12/z-1 - 2z+4/z-1
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
12%2F%28z-1%29+-+%282z%2B4%29%2F%28z-1%29

The LCD = z-1, so just subtract the numerators:

%2812-%282z%2B4%29%29%2F%28z-1%29+
%2812-2z-4%29%2F%28z-1%29+
%288-2z+%29%2F%28z-1%29 or %28-2%28z-4%29%29%2F%28z-1%29

Please see my own non-traditional explanation of Fractions. You can get to my own website by doing a "Bing" search for my last name "Rapalje". Look for "Rapalje Homepage" at the top of the search list. Near the top of my Homepage is a link "Math in Living Color". Click on this link, and look for "Basic Algebra", then "Chapter 3--Fractions".

R^2

Dr. Robert J. Rapalje, Retired
Seminole Community College
Altamonte Springs Campus
Florida