Domains of functions

F(x)=x2-7x and g(x)=5-x2
The domain of (fg)(x) is. ...
The domain of (f/g)(x). ..

Final Answer:

a = R
b = R - { x1,x2 }

Step-by-step explanation:

a=R
g(x)<>0 5x2=0  x2+5=0 x25=0 x1,2=±5=±2.236067977 x1=2.236067977 x2=2.236067977 b=Rx1,x2

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