SOLUTION: In your own words, what are rational expressions? Why must we always be mindful of the final value of the denominator in a rational expression? For example, consider the rational e

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Question 366124: In your own words, what are rational expressions? Why must we always be mindful of the final value of the denominator in a rational expression? For example, consider the rational expression 3x/(x2 – 16). What values in the denominator must we be mindful of? Explain why.


Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Ratio of two polynomial functions.
.
.
Division by zero is undefined.
Beware of any values that make a denominator equal zero.
x%5E2-16=0
x=4 and x=-4 are not values in the domain of f%28x%29=3x%2F%28x%5E2-16%29