Simplify the rational expression. state any restrictions on the variable. n^4-11n^2+30/n^4-7n^2+10

For this case we have the following expression:
 
 We are going to make the following change of variables:
 
 Rewriting the expression we have:
 
 Factoring the expression we have:
 
 Canceling similar terms we have:
 
 Returning the change we have:
 
 The resctrictions of the function are those that make the denominator equal to zero.
 We have then:
 
 
 The simplified expression is:
 
 The restrictions are:
 
 

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