How to Simply Rational Functions? Please help
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How to Simply Rational Functions? Please help

[From: ] [author: ] [Date: 12-06-22] [Hit: ]
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I need help finding the domain and simplifying these functions:

1.) F (x)= 3x - 8 OVER 4x + 20


2.) -7xy^2 OVER 28x^5y

3.) x - 2 OVER 8x^2 - 32

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the domain is anywhere except where the function is not defined. if the denominator equals 0 it is undefined so the domain of 1) is all real numbers except where 4x+20=0 so all real numbers x except where x=-5
2) all real numbers x,y except where 28x^5y=0. this equals zero only when either x or y or both = 0

see if you can do the last one :)
1
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