SOLUTION: adding rational expressions the simplest polynomial that is a multiple of all the denominators defines the necessary condition. What is that condition?
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Question 628366: adding rational expressions the simplest polynomial that is a multiple of all the denominators defines the necessary condition. What is that condition? Answer by jsmallt9(3758) (Show Source):
You can put this solution on YOUR website! When adding rational (i.e. fractional) expressions the "necessary condition" is as it's always been: the denominators must be the same. And "the simplest polynomial that is a multiple of all the denominators" is just a way to describe the lowest common denominator.
Note: When adding rational expressions it is only necessary to have common denominators. It is desirable, not necessary, to use the lowest/simplest common denominator.